diff --git a/demo/main.fnl b/demo/main.fnl
index 51b77fe..c6c8d41 100644
--- a/demo/main.fnl
+++ b/demo/main.fnl
@@ -3,44 +3,76 @@
 (var time 0)
 (var current-effect 1)
 (var particles nil)
-(var starfield-init false)
 (var fire-init false)
 (var rain-init false)
 (var snow-init false)
 
+(var logo-x 256)
+(var logo-y 148)
+(var logo-dx 100)
+(var logo-dy 80)
+(var logo-sprite nil)
+
 (global init (fn []
   (pxl8.load_palette "palettes/gruvbox.ase")
-  (set particles (pxl8.particles_new 1000))))
+  (set particles (pxl8.particles_new 1000))
+  (set logo-sprite (pxl8.load_sprite "sprites/pxl8.ase"))))
 
 (global update (fn [dt]
   (set time (+ time dt))
-  
-  (when (pxl8.key_pressed "1") 
+
+  (when (pxl8.key_pressed "1")
     (set current-effect 1))
-  (when (pxl8.key_pressed "2") 
+  (when (pxl8.key_pressed "2")
     (set current-effect 2))
-  (when (pxl8.key_pressed "3") 
-    (set current-effect 3)
-    (set fire-init false))
-  (when (pxl8.key_pressed "4") 
+  (when (pxl8.key_pressed "3")
+    (set current-effect 3))
+  (when (pxl8.key_pressed "4")
     (set current-effect 4))
-  (when (pxl8.key_pressed "5") 
+  (when (pxl8.key_pressed "5")
     (set current-effect 5)
-    (set rain-init false))
-  (when (pxl8.key_pressed "6") 
+    (set fire-init false))
+  (when (pxl8.key_pressed "6")
     (set current-effect 6)
+    (set rain-init false))
+  (when (pxl8.key_pressed "7")
+    (set current-effect 7)
     (set snow-init false))
-  
+
+  (when (= current-effect 1)
+    (set logo-x (+ logo-x (* logo-dx dt)))
+    (set logo-y (+ logo-y (* logo-dy dt)))
+
+    (when (or (< logo-x 0) (> logo-x 512))
+      (set logo-dx (- logo-dx)))
+    (when (or (< logo-y 0) (> logo-y 296))
+      (set logo-dy (- logo-dy))))
+
   (when particles
     (pxl8.particles_update particles dt))))
 
 (global draw (fn []
   (match current-effect
-    1 (pxl8.vfx_plasma time 0.10 0.04 0)
-    
-    2 (pxl8.vfx_tunnel time 2.0 0.25)
-    
-    3 (do
+    1 (do
+        (pxl8.clr 0)
+        (when logo-sprite
+          (pxl8.sprite logo-sprite logo-x logo-y 128 64))
+        (pxl8.text "Bouncing Logo" 200 10 15)
+        (pxl8.text "Press 1-7 for effects" 10 150 7))
+
+    2 (pxl8.vfx_plasma time 0.10 0.04 0)
+
+    3 (pxl8.vfx_tunnel time 2.0 0.25)
+
+    4 (do
+        (pxl8.clr 0)
+        (local bars [{:base_y 40 :amplitude 20 :height 16 :speed 2.0 :phase 0 :color 14 :fade_color 11}
+                     {:base_y 80 :amplitude 15 :height 16 :speed 2.5 :phase 1.5 :color 20 :fade_color 11}
+                     {:base_y 120 :amplitude 25 :height 16 :speed 1.8 :phase 3.0 :color 26 :fade_color 11}])
+        (pxl8.vfx_raster_bars bars time)
+        (pxl8.text "Raster Bars" 200 10 15))
+
+    5 (do
         (pxl8.clr 0)
         (when particles
           (when (not fire-init)
@@ -49,16 +81,8 @@
             (set fire-init true))
           (pxl8.particles_render particles))
         (pxl8.text "Fire Effect Test" 200 10 15))
-    
-    4 (do
-        (pxl8.clr 0)
-        (local bars [{:base_y 40 :amplitude 20 :height 16 :speed 2.0 :phase 0 :color 14 :fade_color 11}
-                     {:base_y 80 :amplitude 15 :height 16 :speed 2.5 :phase 1.5 :color 20 :fade_color 11}
-                     {:base_y 120 :amplitude 25 :height 16 :speed 1.8 :phase 3.0 :color 26 :fade_color 11}])
-        (pxl8.vfx_copper_bars bars time)
-        (pxl8.text "Copper Bars" 200 10 15))
-    
-    5 (do
+
+    6 (do
         (pxl8.clr 0)
         (when particles
           (when (not rain-init)
@@ -67,8 +91,8 @@
             (set rain-init true))
           (pxl8.particles_render particles))
         (pxl8.text "Rain" 200 10 15))
-    
-    6 (do
+
+    7 (do
         (pxl8.clr 0)
         (when particles
           (when (not snow-init)
diff --git a/demo/palettes/sweaft-64.ase b/demo/palettes/sweaft-64.ase
deleted file mode 100644
index 2a48de0..0000000
Binary files a/demo/palettes/sweaft-64.ase and /dev/null differ
diff --git a/demo/sprites/pxl8.png b/demo/sprites/pxl8.png
deleted file mode 100755
index ad85c8e..0000000
Binary files a/demo/sprites/pxl8.png and /dev/null differ
diff --git a/demo/sprites/trees.ase b/demo/sprites/trees.ase
deleted file mode 100644
index 95c65d7..0000000
Binary files a/demo/sprites/trees.ase and /dev/null differ
diff --git a/demo/tiles/tilesheet-dungeon.ase b/demo/tiles/tilesheet-dungeon.ase
deleted file mode 100644
index 573598a..0000000
Binary files a/demo/tiles/tilesheet-dungeon.ase and /dev/null differ
diff --git a/demo/tiles/tilesheet-world.ase b/demo/tiles/tilesheet-world.ase
deleted file mode 100644
index e28fab2..0000000
Binary files a/demo/tiles/tilesheet-world.ase and /dev/null differ
diff --git a/pxl8.sh b/pxl8.sh
index 90f2523..98e78f0 100755
--- a/pxl8.sh
+++ b/pxl8.sh
@@ -39,21 +39,21 @@ if [[ "$(uname)" == "Linux" ]]; then
     CFLAGS="$CFLAGS -D_GNU_SOURCE"
 fi
 
-print_info() {
-    echo -e "${BLUE}${BOLD}info:${NC} $1"
-}
+compile_source_file() {
+    local src_file="$1"
+    local obj_file="$2"
+    local compile_flags="$3"
 
-print_success() {
-    echo -e "${GREEN}${BOLD}✓${NC} $1"
-}
-
-print_error() {
-    echo -e "${RED}${BOLD}error:${NC} $1" >&2
+    print_info "Compiling: $src_file"
+    if ! $CC -c $compile_flags "$src_file" -o "$obj_file"; then
+        print_error "Compilation failed for $src_file"
+        exit 1
+    fi
 }
 
 detect_simd() {
     local simd_flags=""
-    
+
     case "$(uname -m)" in
         x86_64|amd64)
             if $CC -mavx2 -c -x c /dev/null -o /dev/null 2>/dev/null; then
@@ -68,10 +68,26 @@ detect_simd() {
             fi
             ;;
     esac
-    
+
     echo "$simd_flags"
 }
 
+make_lib_dirs() {
+    mkdir -p lib/linenoise lib/fennel lib/microui/src lib/miniz
+}
+
+print_error() {
+    echo -e "${RED}${BOLD}error:${NC} $1" >&2
+}
+
+print_info() {
+    echo -e "${BLUE}${BOLD}info:${NC} $1"
+}
+
+print_success() {
+    echo -e "${GREEN}${BOLD}✓${NC} $1"
+}
+
 print_usage() {
     echo -e "${BOLD}pxl8${NC} - framework build tool"
     echo
@@ -80,15 +96,18 @@ print_usage() {
     echo
     echo -e "${BOLD}COMMANDS:${NC}"
     echo "    build        Build pxl8"
-    echo "    run          Build and run pxl8 [script.fnl|script.lua]"
     echo "    clean        Remove build artifacts"
+    echo "    run          Build and run pxl8 (optional: cart.pxc or folder)"
+    echo
     echo "    update       Download/update all dependencies"
-    echo "    vendor       Fetch source for dependencies (ex. sdl3)"
+    echo "    vendor       Fetch source for dependencies (ex. SDL3)"
+    echo
     echo "    help         Show this help message"
     echo
     echo -e "${BOLD}OPTIONS:${NC}"
-    echo "    --all        Remove all artifacts including dependencies when cleaning"
-    echo "    --release    Build/run in release mode"
+    echo "    --all        Clean both build artifacts and dependencies"
+    echo "    --deps       Clean only dependencies"
+    echo "    --release    Build/run/clean in release mode (default: debug)"
 }
 
 COMMAND="$1"
@@ -115,6 +134,34 @@ else
     BINDIR="$BINDIR/debug"
 fi
 
+build_luajit() {
+    if [[ ! -f "lib/luajit/src/libluajit.a" ]]; then
+        print_info "Building LuaJIT"
+        cd lib/luajit
+
+        if [[ "$(uname)" == "Darwin" ]]; then
+            export MACOSX_DEPLOYMENT_TARGET="10.11"
+        fi
+
+        make clean >/dev/null 2>&1 || true
+        make -j$(nproc 2>/dev/null || echo 4) > /dev/null 2>&1
+        cd - > /dev/null
+        print_success "Built LuaJIT"
+    fi
+}
+
+build_sdl() {
+    if [[ ! -f "lib/SDL/build/libSDL3.so" ]] && [[ ! -f "lib/SDL/build/libSDL3.a" ]] && [[ ! -f "lib/SDL/build/libSDL3.dylib" ]]; then
+        print_info "Building SDL3"
+        mkdir -p lib/SDL/build
+        cd lib/SDL/build
+        cmake .. -DCMAKE_BUILD_TYPE=Release > /dev/null 2>&1
+        cmake --build . --parallel $(nproc 2>/dev/null || echo 4) > /dev/null 2>&1
+        cd - > /dev/null
+        print_success "Built SDL3"
+    fi
+}
+
 setup_sdl3() {
     if [[ -d "lib/SDL/build" ]]; then
         SDL3_CFLAGS="-Ilib/SDL/include"
@@ -125,49 +172,52 @@ setup_sdl3() {
         SDL3_CFLAGS=$(pkg-config --cflags sdl3 2>/dev/null || echo "")
         SDL3_LIBS=$(pkg-config --libs sdl3 2>/dev/null || echo "")
         SDL3_RPATH=""
-        
+
         if [[ -z "$SDL3_LIBS" ]]; then
             case "$(uname)" in
                 Darwin)
-                    SDL3_CFLAGS="-I/usr/local/include/SDL3"
-                    SDL3_LIBS="-L/usr/local/lib -lSDL3"
+                    if [[ -f "/usr/local/include/SDL3/SDL.h" ]]; then
+                        SDL3_CFLAGS="-I/usr/local/include/SDL3"
+                        SDL3_LIBS="-L/usr/local/lib -lSDL3"
+                    fi
                     ;;
                 Linux)
-                    SDL3_CFLAGS="-I/usr/include/SDL3"
-                    SDL3_LIBS="-lSDL3"
+                    if [[ -f "/usr/include/SDL3/SDL.h" ]]; then
+                        SDL3_CFLAGS="-I/usr/include/SDL3"
+                        SDL3_LIBS="-lSDL3"
+                    fi
                     ;;
                 MINGW*|MSYS*|CYGWIN*)
-                    SDL3_CFLAGS="-I/mingw64/include/SDL3"
-                    SDL3_LIBS="-lSDL3"
+                    if [[ -f "/mingw64/include/SDL3/SDL.h" ]]; then
+                        SDL3_CFLAGS="-I/mingw64/include/SDL3"
+                        SDL3_LIBS="-lSDL3"
+                    fi
                     ;;
             esac
         fi
-        print_info "Using system SDL3"
+
+        if [[ -z "$SDL3_LIBS" ]]; then
+            print_info "System SDL3 not found, vendoring SDL3..."
+            update_sdl
+            build_sdl
+            SDL3_CFLAGS="-Ilib/SDL/include"
+            SDL3_LIBS="-Llib/SDL/build -lSDL3"
+            SDL3_RPATH="-Wl,-rpath,$(pwd)/lib/SDL/build"
+            print_info "Using vendored SDL3"
+        else
+            print_info "Using system SDL3"
+        fi
     fi
 
     CFLAGS="$CFLAGS $SDL3_CFLAGS"
     LIBS="$LIBS $SDL3_LIBS $SDL3_RPATH"
 }
 
-update_linenoise() {
-    print_info "Fetching linenoise"
-    mkdir -p lib/linenoise
-    
-    if curl -s --max-time 5 -o lib/linenoise/linenoise.c https://raw.githubusercontent.com/antirez/linenoise/master/linenoise.c 2>/dev/null && \
-       curl -s --max-time 5 -o lib/linenoise/linenoise.h https://raw.githubusercontent.com/antirez/linenoise/master/linenoise.h 2>/dev/null; then
-        print_success "Updated linenoise"
-    else
-        print_error "Failed to download linenoise"
-        return 1
-    fi
-}
-
 update_fennel() {
     print_info "Fetching Fennel"
-    mkdir -p lib/fennel
-    
+
     local version="1.5.3"
-    
+
     if curl -s --max-time 5 -o lib/fennel/fennel.lua "https://fennel-lang.org/downloads/fennel-${version}.lua" 2>/dev/null; then
         if [[ -f "lib/fennel/fennel.lua" ]] && [[ -s "lib/fennel/fennel.lua" ]]; then
             print_success "Updated Fennel (${version})"
@@ -181,6 +231,18 @@ update_fennel() {
     fi
 }
 
+update_linenoise() {
+    print_info "Fetching linenoise"
+    
+    if curl -s --max-time 5 -o lib/linenoise/linenoise.c https://raw.githubusercontent.com/antirez/linenoise/master/linenoise.c 2>/dev/null && \
+       curl -s --max-time 5 -o lib/linenoise/linenoise.h https://raw.githubusercontent.com/antirez/linenoise/master/linenoise.h 2>/dev/null; then
+        print_success "Updated linenoise"
+    else
+        print_error "Failed to download linenoise"
+        return 1
+    fi
+}
+
 update_luajit() {
     print_info "Fetching LuaJIT"
     
@@ -198,25 +260,8 @@ update_luajit() {
     print_success "Updated LuaJIT (${version})"
 }
 
-build_luajit() {
-    if [[ ! -f "lib/luajit/src/libluajit.a" ]]; then
-        print_info "Building LuaJIT"
-        cd lib/luajit
-        
-        if [[ "$(uname)" == "Darwin" ]]; then
-            export MACOSX_DEPLOYMENT_TARGET="10.11"
-        fi
-        
-        make clean >/dev/null 2>&1 || true
-        make -j$(nproc 2>/dev/null || echo 4) > /dev/null 2>&1
-        cd - > /dev/null
-        print_success "Built LuaJIT"
-    fi
-}
-
 update_microui() {
     print_info "Fetching microui"
-    mkdir -p lib/microui/src
     
     if curl -s --max-time 5 -o lib/microui/src/microui.c https://raw.githubusercontent.com/rxi/microui/master/src/microui.c 2>/dev/null && \
        curl -s --max-time 5 -o lib/microui/src/microui.h https://raw.githubusercontent.com/rxi/microui/master/src/microui.h 2>/dev/null; then
@@ -229,11 +274,10 @@ update_microui() {
 
 update_miniz() {
     print_info "Fetching miniz"
-    mkdir -p lib/miniz
     
     local version="3.0.2"
     
-    if curl -sL --max-time 10 -o /tmp/miniz.zip "https://github.com/richgel999/miniz/releases/download/${version}/miniz-${version}.zip" 2>/dev/null; then
+    if curl -sL --max-time 5 -o /tmp/miniz.zip "https://github.com/richgel999/miniz/releases/download/${version}/miniz-${version}.zip" 2>/dev/null; then
         unzip -qjo /tmp/miniz.zip miniz.c miniz.h -d lib/miniz/ 2>/dev/null
         rm -f /tmp/miniz.zip
         
@@ -249,7 +293,7 @@ update_miniz() {
     fi
 }
 
-vendor_sdl() {
+update_sdl() {
     print_info "Fetching SDL3"
     
     if [[ -d "lib/SDL/.git" ]]; then
@@ -263,18 +307,6 @@ vendor_sdl() {
     print_success "Updated SDL3"
 }
 
-build_sdl() {
-    if [[ ! -f "lib/SDL/build/libSDL3.so" ]] && [[ ! -f "lib/SDL/build/libSDL3.a" ]] && [[ ! -f "lib/SDL/build/libSDL3.dylib" ]]; then
-        print_info "Building SDL3"
-        mkdir -p lib/SDL/build
-        cd lib/SDL/build
-        cmake .. -DCMAKE_BUILD_TYPE=Release > /dev/null 2>&1
-        cmake --build . --parallel $(nproc 2>/dev/null || echo 4) > /dev/null 2>&1
-        cd - > /dev/null
-        print_success "Built SDL3"
-    fi
-}
-
 case "$COMMAND" in
     build)
         mkdir -p "$BUILDDIR"
@@ -286,9 +318,10 @@ case "$COMMAND" in
            [[ ! -f "lib/miniz/miniz.c" ]] || \
            [[ ! -f "lib/fennel/fennel.lua" ]]; then
             print_info "Missing dependencies, fetching..."
-            
-            update_linenoise
+
+            make_lib_dirs
             update_fennel
+            update_linenoise
             update_luajit
             update_microui
             update_miniz
@@ -341,7 +374,7 @@ case "$COMMAND" in
 
         LIB_SOURCE_FILES="lib/linenoise/linenoise.c lib/miniz/miniz.c"
 
-        SRC_SOURCE_FILES="
+        PXL8_SOURCE_FILES="
             src/pxl8.c
             src/pxl8_ase.c
             src/pxl8_blit.c
@@ -367,32 +400,24 @@ case "$COMMAND" in
             obj_name=$(basename "$src_file" .c).o
             obj_file="$OBJECT_DIR/$obj_name"
             OBJECTS="$OBJECTS $obj_file"
-            
+
             if [[ "$src_file" -nt "$obj_file" ]]; then
                 NEED_LINK=true
-                print_info "Compiling: $src_file"
-                if ! $CC -c $COMPILE_FLAGS "$src_file" -o "$obj_file"; then
-                    print_error "Compilation failed for $src_file"
-                    exit 1
-                fi
+                compile_source_file "$src_file" "$obj_file" "$COMPILE_FLAGS"
                 SOURCES_COMPILED="yes"
             fi
         done
         
-        for src_file in $SRC_SOURCE_FILES; do
+        for src_file in $PXL8_SOURCE_FILES; do
             obj_name=$(basename "$src_file" .c).o
             obj_file="$OBJECT_DIR/$obj_name"
             OBJECTS="$OBJECTS $obj_file"
-            
+
             if [[ "$src_file" -nt "$obj_file" ]] || \
                [[ "src/pxl8_types.h" -nt "$obj_file" ]] || \
                [[ "src/pxl8_macros.h" -nt "$obj_file" ]]; then
                 NEED_LINK=true
-                print_info "Compiling: $src_file"
-                if ! $CC -c $COMPILE_FLAGS "$src_file" -o "$obj_file"; then
-                    print_error "Compilation failed for $src_file"
-                    exit 1
-                fi
+                compile_source_file "$src_file" "$obj_file" "$COMPILE_FLAGS"
                 SOURCES_COMPILED="yes"
             fi
         done
@@ -413,31 +438,58 @@ case "$COMMAND" in
 
     run)
         "$0" build "$@" || exit 1
-        
-        SCRIPT=""
+
+        CART=""
         for arg in "$@"; do
             if [[ "$arg" != "--release" ]]; then
-                SCRIPT="$arg"
+                CART="$arg"
                 break
             fi
         done
-        
-        if [[ -z "$SCRIPT" ]]; then
-            SCRIPT="src/fnl/demo.fnl"
+
+        if [[ -z "$CART" ]]; then
+            "$BINDIR/pxl8"
+        else
+            "$BINDIR/pxl8" "$CART"
         fi
-        
-        "$BINDIR/pxl8" "$SCRIPT"
         ;;
 
     clean)
-        if [[ "$1" == "--all" ]] || [[ "$1" == "--deps" ]]; then
-            print_info "Removing all build artifacts and dependencies"
-            rm -rf "$BUILDDIR" "$BINDIR" lib
+        CLEAN_ALL=false
+        CLEAN_DEPS=false
+        CLEAN_RELEASE=false
+
+        for arg in "$@"; do
+            case "$arg" in
+                --all) CLEAN_ALL=true ;;
+                --deps) CLEAN_DEPS=true ;;
+                --release) CLEAN_RELEASE=true ;;
+            esac
+        done
+
+        if [[ "$CLEAN_RELEASE" == true ]]; then
+            BUILD_PATH=".build/release"
+            BIN_PATH="bin/release"
+            MODE="release"
+        else
+            BUILD_PATH=".build/debug"
+            BIN_PATH="bin/debug"
+            MODE="debug"
+        fi
+
+        if [[ "$CLEAN_ALL" == true ]]; then
+            print_info "Removing build artifacts and dependencies"
+            rm -rf "$BUILD_PATH" "$BIN_PATH" lib
+            print_success "Cleaned all"
+        elif [[ "$CLEAN_DEPS" == true ]]; then
+            print_info "Removing dependencies"
+            rm -rf lib
+            print_success "Cleaned dependencies"
         else
             print_info "Removing build artifacts"
-            rm -rf "$BUILDDIR" "$BINDIR"
+            rm -rf "$BUILD_PATH" "$BIN_PATH"
+            print_success "Cleaned"
         fi
-        print_success "Cleaned"
         ;;
 
     update)
@@ -450,7 +502,7 @@ case "$COMMAND" in
         ;;
 
     vendor)
-        vendor_sdl
+        update_sdl
         ;;
 
     help|--help|-h|"")
diff --git a/src/lua/pxl8.lua b/src/lua/pxl8.lua
index 30e422b..553403b 100644
--- a/src/lua/pxl8.lua
+++ b/src/lua/pxl8.lua
@@ -100,8 +100,8 @@ function pxl8.key_pressed(key)
     return C.pxl8_key_pressed(input, key)
 end
 
-function pxl8.vfx_copper_bars(bars, time)
-    local c_bars = ffi.new("pxl8_copper_bar[?]", #bars)
+function pxl8.vfx_raster_bars(bars, time)
+    local c_bars = ffi.new("pxl8_raster_bar[?]", #bars)
     for i, bar in ipairs(bars) do
         c_bars[i-1].base_y = bar.base_y or 0
         c_bars[i-1].amplitude = bar.amplitude or 10
@@ -111,7 +111,7 @@ function pxl8.vfx_copper_bars(bars, time)
         c_bars[i-1].color = bar.color or 15
         c_bars[i-1].fade_color = bar.fade_color or bar.color or 15
     end
-    C.pxl8_vfx_copper_bars(gfx, c_bars, #bars, time)
+    C.pxl8_vfx_raster_bars(gfx, c_bars, #bars, time)
 end
 
 function pxl8.vfx_plasma(time, scale1, scale2, palette_offset)
diff --git a/src/pxl8.c b/src/pxl8.c
index 83d76f2..e721826 100644
--- a/src/pxl8.c
+++ b/src/pxl8.c
@@ -32,13 +32,13 @@ typedef struct pxl8_repl_state {
     bool running;
 } pxl8_repl_state;
 
-typedef struct pxl8_app_state {
+typedef struct pxl8_state {
+    pxl8_cart* cart;
     pxl8_color_mode color_mode;
     pxl8_gfx_ctx gfx;
     lua_State* lua;
     pxl8_repl_state repl;
     pxl8_resolution resolution;
-    pxl8_cart* cart;
 
     f32 fps_timer;
     i32 frame_count;
@@ -52,7 +52,7 @@ typedef struct pxl8_app_state {
     time_t script_mod_time;
     
     pxl8_input_state input;
-} pxl8_app_state;
+} pxl8_state;
 
 static void pxl8_repl_completion(const char* buf, linenoiseCompletions* lc) {
     const char* fennel_keywords[] = {
@@ -183,7 +183,7 @@ static pxl8_repl_command* pxl8_repl_pop_command(pxl8_repl_state* repl) {
     return cmd;
 }
 
-static void load_script(pxl8_app_state* app) {
+static void load_script(pxl8_state* app) {
     const char* ext = strrchr(app->script_path, '.');
 
     if (ext && strcmp(ext, ".fnl") == 0) {
@@ -233,7 +233,7 @@ static time_t get_file_mod_time(const char* path) {
 }
 
 SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[]) {
-    static pxl8_app_state app = {0};
+    static pxl8_state app = {0};
     
     if (!SDL_Init(SDL_INIT_VIDEO | SDL_INIT_EVENTS)) {
         pxl8_error("SDL_Init failed: %s", SDL_GetError());
@@ -299,36 +299,40 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[]) {
         return SDL_APP_FAILURE;
     }
 
-    if (script_arg) {
-        struct stat st;
-        bool is_cart = (stat(script_arg, &st) == 0 && S_ISDIR(st.st_mode)) ||
-                       strstr(script_arg, ".pxc");
+    const char* cart_path = script_arg ? script_arg : "demo";
 
-        if (is_cart) {
-            char* original_cwd = getcwd(NULL, 0);
-            app.cart = pxl8_cart_new();
-            if (pxl8_cart_load(app.cart, script_arg) == PXL8_OK) {
-                pxl8_lua_setup_cart_path(app.lua, app.cart->base_path, original_cwd);
-                pxl8_cart_mount(app.cart);
-                strcpy(app.script_path, "main.fnl");
-                pxl8_info("Loaded cart: %s", app.cart->name);
-            } else {
-                pxl8_error("Failed to load cart: %s", script_arg);
-                return SDL_APP_FAILURE;
-            }
-            free(original_cwd);
-        } else {
-            strncpy(app.script_path, script_arg, sizeof(app.script_path) - 1);
-            app.script_path[sizeof(app.script_path) - 1] = '\0';
+    struct stat st;
+    bool is_cart = (stat(cart_path, &st) == 0 && S_ISDIR(st.st_mode)) ||
+                   (cart_path && strstr(cart_path, ".pxc"));
+
+    if (is_cart) {
+        char* original_cwd = getcwd(NULL, 0);
+        app.cart = calloc(1, sizeof(pxl8_cart));
+        if (!app.cart) {
+            pxl8_error("Failed to allocate memory for cart");
+            return false;
         }
-    } else {
-        strcpy(app.script_path, "src/fnl/demo.fnl");
+        if (pxl8_cart_load(app.cart, cart_path) == PXL8_OK) {
+            pxl8_lua_setup_cart_path(app.lua, app.cart->base_path, original_cwd);
+            pxl8_cart_mount(app.cart);
+            strcpy(app.script_path, "main.fnl");
+            pxl8_info("Loaded cart: %s", app.cart->name);
+        } else {
+            pxl8_error("Failed to load cart: %s", cart_path);
+            return SDL_APP_FAILURE;
+        }
+        free(original_cwd);
+    } else if (script_arg) {
+        strncpy(app.script_path, script_arg, sizeof(app.script_path) - 1);
+        app.script_path[sizeof(app.script_path) - 1] = '\0';
     }
-    
+
     pxl8_lua_setup_contexts(app.lua, &app.gfx, &app.input);
-    
-    app.script_mod_time = get_file_mod_time(app.script_path);
-    load_script(&app);
+
+    if (app.script_path[0] != '\0') {
+        app.script_mod_time = get_file_mod_time(app.script_path);
+        load_script(&app);
+    }
     
     if (app.repl_mode) {
         pxl8_repl_init(&app.repl);
@@ -353,7 +357,7 @@ SDL_AppResult SDL_AppInit(void** appstate, int argc, char* argv[]) {
 }
 
 SDL_AppResult SDL_AppIterate(void* appstate) {
-    pxl8_app_state* app = (pxl8_app_state*)appstate;
+    pxl8_state* app = (pxl8_state*)appstate;
     int width, height;
 
     SDL_GetWindowSize(app->gfx.window, &width, &height);
@@ -465,7 +469,7 @@ SDL_AppResult SDL_AppIterate(void* appstate) {
 }
 
 SDL_AppResult SDL_AppEvent(void* appstate, SDL_Event* event) {
-    pxl8_app_state* app = (pxl8_app_state*)appstate;
+    pxl8_state* app = (pxl8_state*)appstate;
     
     switch (event->type) {
         case SDL_EVENT_QUIT:
@@ -502,7 +506,7 @@ SDL_AppResult SDL_AppEvent(void* appstate, SDL_Event* event) {
 }
 
 void SDL_AppQuit(void* appstate, SDL_AppResult result) {
-    pxl8_app_state* app = (pxl8_app_state*)appstate;
+    pxl8_state* app = (pxl8_state*)appstate;
     (void)result;
     
     if (app) {
@@ -511,7 +515,8 @@ void SDL_AppQuit(void* appstate, SDL_AppResult result) {
             pxl8_repl_shutdown(&app->repl);
         }
         if (app->cart) {
-            pxl8_cart_destroy(app->cart);
+            pxl8_cart_unload(app->cart);
+            free(app->cart);
             app->cart = NULL;
         }
         pxl8_lua_shutdown(app->lua);
diff --git a/src/pxl8_ase.c b/src/pxl8_ase.c
index 186230f..359b6e4 100644
--- a/src/pxl8_ase.c
+++ b/src/pxl8_ase.c
@@ -1,6 +1,6 @@
+#include <SDL3/SDL.h>
 #include <stdlib.h>
 #include <string.h>
-#include <SDL3/SDL.h>
 
 #define MINIZ_NO_STDIO
 #define MINIZ_NO_TIME
@@ -89,8 +89,7 @@ static pxl8_result parse_old_palette_chunk(const u8* data, pxl8_ase_palette* pal
             u8 r = packet_data[0];
             u8 g = packet_data[1];
             u8 b = packet_data[2];
-            
-            // Store in ABGR format for GPU
+
             palette->colors[color_index] = 0xFF000000 | (b << 16) | (g << 8) | r;
             packet_data += 3;
         }
@@ -100,16 +99,12 @@ static pxl8_result parse_old_palette_chunk(const u8* data, pxl8_ase_palette* pal
 }
 
 static pxl8_result parse_layer_chunk(const u8* data, pxl8_ase_layer* layer) {
-    layer->flags = read_u16_le(data);           // Offset 0: flags (2 bytes)
-    layer->layer_type = read_u16_le(data + 2);  // Offset 2: layer_type (2 bytes)
-    layer->child_level = read_u16_le(data + 4); // Offset 4: child_level (2 bytes)
-    // Offset 6: default_width (2 bytes) - skip
-    // Offset 8: default_height (2 bytes) - skip  
-    layer->blend_mode = read_u16_le(data + 10); // Offset 10: blend_mode (2 bytes)
-    layer->opacity = data[12];                  // Offset 12: opacity (1 byte)
-    // Offset 13-15: reserved (3 bytes) - skip
-    
-    // Offset 16: name length (2 bytes), then name string at offset 18
+    layer->flags = read_u16_le(data);
+    layer->layer_type = read_u16_le(data + 2);
+    layer->child_level = read_u16_le(data + 4);
+    layer->blend_mode = read_u16_le(data + 10);
+    layer->opacity = data[12];
+
     u16 name_len = read_u16_le(data + 16);
     if (name_len > 0) {
         layer->name = (char*)SDL_malloc(name_len + 1);
@@ -124,9 +119,9 @@ static pxl8_result parse_layer_chunk(const u8* data, pxl8_ase_layer* layer) {
 }
 
 static pxl8_result parse_palette_chunk(const u8* data, pxl8_ase_palette* palette) {
-    palette->entry_count = read_u32_le(data);       // Offset 0: entry_count (4 bytes)
-    palette->first_color = read_u32_le(data + 4);   // Offset 4: first_color (4 bytes)
-    palette->last_color = read_u32_le(data + 8);    // Offset 8: last_color (4 bytes)
+    palette->entry_count = read_u32_le(data);
+    palette->first_color = read_u32_le(data + 4);
+    palette->last_color = read_u32_le(data + 8);
     
     u32 color_count = palette->entry_count;
     palette->colors = (u32*)SDL_malloc(color_count * sizeof(u32));
@@ -134,15 +129,14 @@ static pxl8_result parse_palette_chunk(const u8* data, pxl8_ase_palette* palette
         return PXL8_ERROR_OUT_OF_MEMORY;
     }
 
-    const u8* color_data = data + 20;   // Skip palette header (20 bytes)
+    const u8* color_data = data + 20;
     for (u32 i = 0; i < color_count; i++) {
-        u16 flags = read_u16_le(color_data);     // Offset 0: flags (2 bytes)
-        u8 r = color_data[2];                   // Offset 2: red (1 byte)
-        u8 g = color_data[3];                   // Offset 3: green (1 byte)
-        u8 b = color_data[4];                   // Offset 4: blue (1 byte)
-        u8 a = color_data[5];                   // Offset 5: alpha (1 byte)
-        
-        // Store in ABGR format for GPU
+        u16 flags = read_u16_le(color_data);
+        u8 r = color_data[2];
+        u8 g = color_data[3];
+        u8 b = color_data[4];
+        u8 a = color_data[5];
+
         palette->colors[i] = (a << 24) | (b << 16) | (g << 8) | r;
         color_data += 6;
         
@@ -160,21 +154,19 @@ static pxl8_result parse_cel_chunk(const u8* data, u32 chunk_size, pxl8_ase_cel*
         return PXL8_ERROR_ASE_MALFORMED_CHUNK;
     }
 
-    cel->layer_index = read_u16_le(data);    // Offset 0: layer_index (2 bytes)
-    cel->x = read_i16_le(data + 2);          // Offset 2: x (2 bytes)
-    cel->y = read_i16_le(data + 4);          // Offset 4: y (2 bytes)
-    cel->opacity = data[6];                  // Offset 6: opacity (1 byte)
-    cel->cel_type = read_u16_le(data + 7);   // Offset 7: cel_type (2 bytes)
+    cel->layer_index = read_u16_le(data);
+    cel->x = read_i16_le(data + 2);
+    cel->y = read_i16_le(data + 4);
+    cel->opacity = data[6];
+    cel->cel_type = read_u16_le(data + 7);
 
     if (cel->cel_type == 2) {
         if (chunk_size < 20) {
             return PXL8_ERROR_ASE_MALFORMED_CHUNK;
         }
 
-        // Offset 9: Z-Index (2 bytes) - skip
-        // Offset 11: Reserved (5 bytes) - skip
-        cel->width = read_u16_le(data + 16);     // Offset 16: width (2 bytes)
-        cel->height = read_u16_le(data + 18);    // Offset 18: height (2 bytes)
+        cel->width = read_u16_le(data + 16);
+        cel->height = read_u16_le(data + 18);
         
         u32 pixel_data_size = cel->width * cel->height;
         u32 compressed_data_size = chunk_size - 20;
@@ -183,8 +175,7 @@ static pxl8_result parse_cel_chunk(const u8* data, u32 chunk_size, pxl8_ase_cel*
         if (!cel->pixel_data) {
             return PXL8_ERROR_OUT_OF_MEMORY;
         }
-        
-        // Decompress ZLIB data
+
         mz_ulong dest_len = pixel_data_size;
         int result = mz_uncompress(cel->pixel_data, &dest_len, data + 20, compressed_data_size);
         if (result != MZ_OK) {
@@ -274,16 +265,17 @@ pxl8_result pxl8_ase_load(const char* filepath, pxl8_ase_file* ase_file) {
                 case PXL8_ASE_CHUNK_OLD_PALETTE:  // 0x0004
                     if (!ase_file->palette.colors) {
                         result = parse_old_palette_chunk(chunk_payload, &ase_file->palette);
-                        pxl8_debug("Parsed old palette: %d colors, indices %d-%d", ase_file->palette.entry_count, ase_file->palette.first_color, ase_file->palette.last_color);
+                        pxl8_debug("Parsed old palette: %d colors, indices %d-%d",
+                                    ase_file->palette.entry_count, ase_file->palette.first_color, ase_file->palette.last_color);
                     } else {
                         pxl8_debug("Ignoring old palette (0x0004) - new palette (0x2019) already loaded");
                     }
                     break;
                     
                 case PXL8_ASE_CHUNK_LAYER: {  // 0x2004
-                    // Need to allocate or reallocate layers array
-                    ase_file->layers = (pxl8_ase_layer*)SDL_realloc(ase_file->layers, 
-                        (ase_file->layer_count + 1) * sizeof(pxl8_ase_layer));
+                    ase_file->layers =
+                        (pxl8_ase_layer*)SDL_realloc(ase_file->layers,
+                            (ase_file->layer_count + 1) * sizeof(pxl8_ase_layer));
                     if (!ase_file->layers) {
                         result = PXL8_ERROR_OUT_OF_MEMORY;
                         break;
@@ -315,15 +307,12 @@ pxl8_result pxl8_ase_load(const char* filepath, pxl8_ase_file* ase_file) {
                             u32 src_offset = y * cel.width;
                             u32 dst_offset = (y + cel.y) * frame->width + cel.x;
                             if (dst_offset + copy_width <= pixel_count) {
-                                // Composite layers: only copy non-transparent pixels 
-                                // Check if palette color is transparent (#00000000)
                                 for (u32 x = 0; x < copy_width; x++) {
                                     u8 src_pixel = cel.pixel_data[src_offset + x];
                                     bool is_transparent = false;
                                     
                                     if (src_pixel < ase_file->palette.entry_count && ase_file->palette.colors) {
                                         u32 color = ase_file->palette.colors[src_pixel];
-                                        // Check if color is fully transparent (alpha = 0)
                                         is_transparent = ((color >> 24) & 0xFF) == 0;
                                     }
                                     
@@ -331,9 +320,9 @@ pxl8_result pxl8_ase_load(const char* filepath, pxl8_ase_file* ase_file) {
                                         frame->pixels[dst_offset + x] = src_pixel;
                                     }
                                 }
-                                // Debug: check first few pixels of each row
                                 if (y < 3) {
-                                    pxl8_debug("Row %d: cel[%d]=%d, frame[%d]=%d", y, src_offset, cel.pixel_data[src_offset], dst_offset, frame->pixels[dst_offset]);
+                                    pxl8_debug("Row %d: cel[%d]=%d, frame[%d]=%d",
+                                                y, src_offset, cel.pixel_data[src_offset], dst_offset, frame->pixels[dst_offset]);
                                 }
                             }
                         }
@@ -347,7 +336,8 @@ pxl8_result pxl8_ase_load(const char* filepath, pxl8_ase_file* ase_file) {
                         SDL_free(ase_file->palette.colors);
                     }
                     result = parse_palette_chunk(chunk_payload, &ase_file->palette);
-                    pxl8_debug("Parsed new palette: %d colors, indices %d-%d", ase_file->palette.entry_count, ase_file->palette.first_color, ase_file->palette.last_color);
+                    pxl8_debug("Parsed new palette: %d colors, indices %d-%d",
+                                ase_file->palette.entry_count, ase_file->palette.first_color, ase_file->palette.last_color);
                     break;
                     
                 default:
@@ -355,10 +345,12 @@ pxl8_result pxl8_ase_load(const char* filepath, pxl8_ase_file* ase_file) {
             }
             
             if (result != PXL8_OK) break;
+
             chunk_data += chunk_header.chunk_size;
         }
         
         if (result != PXL8_OK) break;
+
         frame_data += frame_header.frame_bytes;
     }
 
diff --git a/src/pxl8_ase.h b/src/pxl8_ase.h
index 2ff3460..efaf9ed 100644
--- a/src/pxl8_ase.h
+++ b/src/pxl8_ase.h
@@ -1,5 +1,4 @@
 #pragma once
-
 #include "pxl8_types.h"
 
 #define PXL8_ASE_MAGIC 0xA5E0
diff --git a/src/pxl8_blit.c b/src/pxl8_blit.c
index 23e6682..f56ee50 100644
--- a/src/pxl8_blit.c
+++ b/src/pxl8_blit.c
@@ -1,33 +1,6 @@
 #include "pxl8_blit.h"
 #include "pxl8_simd.h"
 
-void pxl8_blit_simd_indexed(u8* fb, u32 fb_width, const u8* sprite, u32 atlas_width,
-                            i32 x, i32 y, u32 w, u32 h) {
-    u8* dest_base = fb + y * fb_width + x;
-    const u8* src_base = sprite;
-    
-    for (u32 row = 0; row < h; row++) {
-        u8* dest_row = dest_base + row * fb_width;
-        const u8* src_row = src_base + row * atlas_width;
-        
-        u32 col = 0;
-        for (; col + PXL8_SIMD_WIDTH_U8 <= w; col += PXL8_SIMD_WIDTH_U8) {
-            pxl8_simd_vec src_vec = pxl8_simd_load_u8(src_row + col);
-            pxl8_simd_vec dest_vec = pxl8_simd_load_u8(dest_row + col);
-            pxl8_simd_vec zero = pxl8_simd_zero_u8();
-            pxl8_simd_vec mask = pxl8_simd_cmpeq_u8(src_vec, zero);
-            pxl8_simd_vec result = pxl8_simd_blendv_u8(src_vec, dest_vec, mask);
-            pxl8_simd_store_u8(dest_row + col, result);
-        }
-        
-        for (; col < w; col++) {
-            if (src_row[col] != 0) {
-                dest_row[col] = src_row[col];
-            }
-        }
-    }
-}
-
 void pxl8_blit_simd_hicolor(u32* fb, u32 fb_width, const u32* sprite, u32 atlas_width,
                             i32 x, i32 y, u32 w, u32 h) {
     u32* dest_base = fb + y * fb_width + x;
@@ -56,3 +29,30 @@ void pxl8_blit_simd_hicolor(u32* fb, u32 fb_width, const u32* sprite, u32 atlas_
         }
     }
 }
+
+void pxl8_blit_simd_indexed(u8* fb, u32 fb_width, const u8* sprite, u32 atlas_width,
+                            i32 x, i32 y, u32 w, u32 h) {
+    u8* dest_base = fb + y * fb_width + x;
+    const u8* src_base = sprite;
+    
+    for (u32 row = 0; row < h; row++) {
+        u8* dest_row = dest_base + row * fb_width;
+        const u8* src_row = src_base + row * atlas_width;
+        
+        u32 col = 0;
+        for (; col + PXL8_SIMD_WIDTH_U8 <= w; col += PXL8_SIMD_WIDTH_U8) {
+            pxl8_simd_vec src_vec = pxl8_simd_load_u8(src_row + col);
+            pxl8_simd_vec dest_vec = pxl8_simd_load_u8(dest_row + col);
+            pxl8_simd_vec zero = pxl8_simd_zero_u8();
+            pxl8_simd_vec mask = pxl8_simd_cmpeq_u8(src_vec, zero);
+            pxl8_simd_vec result = pxl8_simd_blendv_u8(src_vec, dest_vec, mask);
+            pxl8_simd_store_u8(dest_row + col, result);
+        }
+        
+        for (; col < w; col++) {
+            if (src_row[col] != 0) {
+                dest_row[col] = src_row[col];
+            }
+        }
+    }
+}
diff --git a/src/pxl8_blit.h b/src/pxl8_blit.h
index 39c8004..26576a8 100644
--- a/src/pxl8_blit.h
+++ b/src/pxl8_blit.h
@@ -7,13 +7,21 @@ static inline bool pxl8_is_simd_aligned(u32 w) {
     return w >= PXL8_SIMD_WIDTH_U8 && (w % PXL8_SIMD_WIDTH_U8 == 0);
 }
 
-void pxl8_blit_simd_indexed(
-    u8* fb, u32 fb_width,
-    const u8* sprite, u32 atlas_width,
-    i32 x, i32 y, u32 w, u32 h
-);
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void pxl8_blit_simd_hicolor(
     u32* fb, u32 fb_width,
     const u32* sprite, u32 atlas_width,
     i32 x, i32 y, u32 w, u32 h
 );
+void pxl8_blit_simd_indexed(
+    u8* fb, u32 fb_width,
+    const u8* sprite, u32 atlas_width,
+    i32 x, i32 y, u32 w, u32 h
+);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/pxl8_cart.c b/src/pxl8_cart.c
index 9501e2f..c7bf437 100644
--- a/src/pxl8_cart.c
+++ b/src/pxl8_cart.c
@@ -8,17 +8,38 @@
 #include <unistd.h>
 #include "../lib/miniz/miniz.h"
 
-static pxl8_cart* s_current_cart = NULL;
-static char* s_original_cwd = NULL;
+static pxl8_cart* __pxl8_current_cart = NULL;
+static char* __pxl8_original_cwd = NULL;
 
-static bool is_directory(const char* path) {
-    struct stat st;
-    return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
-}
+static void pxl8_add_file_recursive(mz_zip_archive* zip, const char* dir_path, const char* prefix) {
+    DIR* dir = opendir(dir_path);
+    if (!dir) return;
 
-static bool is_pxc_file(const char* path) {
-    size_t len = strlen(path);
-    return len > 4 && strcmp(path + len - 4, ".pxc") == 0;
+    struct dirent* entry;
+    while ((entry = readdir(dir)) != NULL) {
+        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) continue;
+
+        char full_path[1024];
+        char zip_path[1024];
+        snprintf(full_path, sizeof(full_path), "%s/%s", dir_path, entry->d_name);
+        snprintf(zip_path, sizeof(zip_path), "%s%s", prefix, entry->d_name);
+
+        struct stat st;
+        if (stat(full_path, &st) == 0) {
+            if (S_ISDIR(st.st_mode)) {
+                char new_prefix[1025];
+                snprintf(new_prefix, sizeof(new_prefix), "%s/", zip_path);
+                pxl8_add_file_recursive(zip, full_path, new_prefix);
+            } else {
+                pxl8_info("Adding: %s", zip_path);
+                if (!mz_zip_writer_add_file(zip, zip_path, full_path, NULL, 0, MZ_BEST_COMPRESSION)) {
+                    pxl8_warn("Failed to add file: %s", zip_path);
+                }
+            }
+        }
+    }
+
+    closedir(dir);
 }
 
 static char* get_cart_name(const char* path) {
@@ -39,19 +60,18 @@ static char* get_cart_name(const char* path) {
     return name;
 }
 
-pxl8_cart* pxl8_cart_new(void) {
-    pxl8_cart* cart = calloc(1, sizeof(pxl8_cart));
-    if (!cart) {
-        pxl8_error("Failed to allocate cart");
-        return NULL;
-    }
-    return cart;
+static bool is_directory(const char* path) {
+    struct stat st;
+    return stat(path, &st) == 0 && S_ISDIR(st.st_mode);
 }
 
-void pxl8_cart_destroy(pxl8_cart* cart) {
-    if (!cart) return;
-    pxl8_cart_unload(cart);
-    free(cart);
+static bool is_pxc_file(const char* path) {
+    size_t len = strlen(path);
+    return len > 4 && strcmp(path + len - 4, ".pxc") == 0;
+}
+
+pxl8_cart* pxl8_cart_current(void) {
+    return __pxl8_current_cart;
 }
 
 pxl8_result pxl8_cart_load(pxl8_cart* cart, const char* path) {
@@ -128,7 +148,7 @@ pxl8_result pxl8_cart_load(pxl8_cart* cart, const char* path) {
             mz_zip_archive_file_stat file_stat;
             if (!mz_zip_reader_file_stat(&zip, i, &file_stat)) continue;
 
-            char extract_path[512];
+            char extract_path[1024];
             snprintf(extract_path, sizeof(extract_path), "%s/%s", temp_dir, file_stat.m_filename);
 
             if (file_stat.m_is_directory) {
@@ -171,6 +191,8 @@ void pxl8_cart_unload(pxl8_cart* cart) {
         system(cmd);
     }
 
+    char* cart_name = cart->name ? strdup(cart->name) : NULL;
+
     if (cart->base_path) {
         free(cart->base_path);
         cart->base_path = NULL;
@@ -189,26 +211,31 @@ void pxl8_cart_unload(pxl8_cart* cart) {
     cart->archive_size = 0;
     cart->is_folder = false;
     cart->is_mounted = false;
+
+    if (cart_name) {
+        pxl8_info("Unloaded cart: %s", cart_name);
+        free(cart_name);
+    }
 }
 
 pxl8_result pxl8_cart_mount(pxl8_cart* cart) {
     if (!cart || !cart->base_path) return PXL8_ERROR_NULL_POINTER;
     if (cart->is_mounted) return PXL8_OK;
 
-    if (s_current_cart) {
-        pxl8_cart_unmount(s_current_cart);
+    if (__pxl8_current_cart) {
+        pxl8_cart_unmount(__pxl8_current_cart);
     }
 
-    s_original_cwd = getcwd(NULL, 0);
+    __pxl8_original_cwd = getcwd(NULL, 0);
     if (chdir(cart->base_path) != 0) {
         pxl8_error("Failed to change to cart directory: %s", cart->base_path);
-        free(s_original_cwd);
-        s_original_cwd = NULL;
+        free(__pxl8_original_cwd);
+        __pxl8_original_cwd = NULL;
         return PXL8_ERROR_FILE_NOT_FOUND;
     }
 
     cart->is_mounted = true;
-    s_current_cart = cart;
+    __pxl8_current_cart = cart;
 
     pxl8_info("Mounted cart: %s", cart->name);
     return PXL8_OK;
@@ -217,15 +244,15 @@ pxl8_result pxl8_cart_mount(pxl8_cart* cart) {
 void pxl8_cart_unmount(pxl8_cart* cart) {
     if (!cart || !cart->is_mounted) return;
 
-    if (s_original_cwd) {
-        chdir(s_original_cwd);
-        free(s_original_cwd);
-        s_original_cwd = NULL;
+    if (__pxl8_original_cwd) {
+        chdir(__pxl8_original_cwd);
+        free(__pxl8_original_cwd);
+        __pxl8_original_cwd = NULL;
     }
 
     cart->is_mounted = false;
-    if (s_current_cart == cart) {
-        s_current_cart = NULL;
+    if (__pxl8_current_cart == cart) {
+        __pxl8_current_cart = NULL;
     }
 
     pxl8_info("Unmounted cart: %s", cart->name);
@@ -252,37 +279,6 @@ bool pxl8_cart_file_exists(const pxl8_cart* cart, const char* path) {
     return exists;
 }
 
-static void pxl8_add_files_recursive(mz_zip_archive* zip, const char* dir_path, const char* prefix) {
-    DIR* dir = opendir(dir_path);
-    if (!dir) return;
-
-    struct dirent* entry;
-    while ((entry = readdir(dir)) != NULL) {
-        if (strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0) continue;
-
-        char full_path[512];
-        char zip_path[512];
-        snprintf(full_path, sizeof(full_path), "%s/%s", dir_path, entry->d_name);
-        snprintf(zip_path, sizeof(zip_path), "%s%s", prefix, entry->d_name);
-
-        struct stat st;
-        if (stat(full_path, &st) == 0) {
-            if (S_ISDIR(st.st_mode)) {
-                char new_prefix[512];
-                snprintf(new_prefix, sizeof(new_prefix), "%s/", zip_path);
-                pxl8_add_files_recursive(zip, full_path, new_prefix);
-            } else {
-                pxl8_info("Adding: %s", zip_path);
-                if (!mz_zip_writer_add_file(zip, zip_path, full_path, NULL, 0, MZ_BEST_COMPRESSION)) {
-                    pxl8_warn("Failed to add file: %s", zip_path);
-                }
-            }
-        }
-    }
-
-    closedir(dir);
-}
-
 pxl8_result pxl8_cart_pack(const char* folder_path, const char* output_path) {
     if (!folder_path || !output_path) return PXL8_ERROR_NULL_POINTER;
 
@@ -308,7 +304,7 @@ pxl8_result pxl8_cart_pack(const char* folder_path, const char* output_path) {
     }
 
     pxl8_info("Packing cart: %s -> %s", folder_path, output_path);
-    pxl8_add_files_recursive(&zip, folder_path, "");
+    pxl8_add_file_recursive(&zip, folder_path, "");
 
     if (!mz_zip_writer_finalize_archive(&zip)) {
         pxl8_error("Failed to finalize archive");
@@ -320,7 +316,3 @@ pxl8_result pxl8_cart_pack(const char* folder_path, const char* output_path) {
     pxl8_info("Cart packed successfully!");
     return PXL8_OK;
 }
-
-pxl8_cart* pxl8_cart_current(void) {
-    return s_current_cart;
-}
diff --git a/src/pxl8_cart.h b/src/pxl8_cart.h
index 25e2880..52b101c 100644
--- a/src/pxl8_cart.h
+++ b/src/pxl8_cart.h
@@ -3,33 +3,26 @@
 #include "pxl8_types.h"
 
 typedef struct pxl8_cart {
-    char* base_path;
-    char* name;
     void* archive_data;
     size_t archive_size;
+    char* base_path;
     bool is_folder;
     bool is_mounted;
+    char* name;
 } pxl8_cart;
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-pxl8_result pxl8_cart_load(pxl8_cart* cart, const char* path);
-void pxl8_cart_unload(pxl8_cart* cart);
-
-pxl8_result pxl8_cart_mount(pxl8_cart* cart);
-void pxl8_cart_unmount(pxl8_cart* cart);
-
-char* pxl8_cart_resolve_path(const pxl8_cart* cart, const char* relative_path);
-bool pxl8_cart_file_exists(const pxl8_cart* cart, const char* path);
-
-pxl8_cart* pxl8_cart_new(void);
-void pxl8_cart_destroy(pxl8_cart* cart);
-
-pxl8_result pxl8_cart_pack(const char* folder_path, const char* output_path);
-
 pxl8_cart* pxl8_cart_current(void);
+bool pxl8_cart_file_exists(const pxl8_cart* cart, const char* path);
+pxl8_result pxl8_cart_load(pxl8_cart* cart, const char* path);
+pxl8_result pxl8_cart_mount(pxl8_cart* cart);
+pxl8_result pxl8_cart_pack(const char* folder_path, const char* output_path);
+char* pxl8_cart_resolve_path(const pxl8_cart* cart, const char* relative_path);
+void pxl8_cart_unload(pxl8_cart* cart);
+void pxl8_cart_unmount(pxl8_cart* cart);
 
 #ifdef __cplusplus
 }
diff --git a/src/pxl8_font.c b/src/pxl8_font.c
index d3b7ab2..5ae5466 100644
--- a/src/pxl8_font.c
+++ b/src/pxl8_font.c
@@ -2,18 +2,6 @@
 #include <SDL3/SDL.h>
 #include <string.h>
 
-const pxl8_glyph* pxl8_font_find_glyph(const pxl8_font* font, u32 codepoint) {
-    if (!font || !font->glyphs) return NULL;
-    
-    for (u32 i = 0; i < font->glyph_count; i++) {
-        if (font->glyphs[i].codepoint == codepoint) {
-            return &font->glyphs[i];
-        }
-    }
-    
-    return NULL;
-}
-
 pxl8_result pxl8_font_create_atlas(const pxl8_font* font, u8** atlas_data, i32* atlas_width, i32* atlas_height) {
     if (!font || !atlas_data || !atlas_width || !atlas_height) {
         return PXL8_ERROR_NULL_POINTER;
@@ -58,3 +46,15 @@ pxl8_result pxl8_font_create_atlas(const pxl8_font* font, u8** atlas_data, i32*
     
     return PXL8_OK;
 }
+
+const pxl8_glyph* pxl8_font_find_glyph(const pxl8_font* font, u32 codepoint) {
+    if (!font || !font->glyphs) return NULL;
+    
+    for (u32 i = 0; i < font->glyph_count; i++) {
+        if (font->glyphs[i].codepoint == codepoint) {
+            return &font->glyphs[i];
+        }
+    }
+    
+    return NULL;
+}
diff --git a/src/pxl8_font.h b/src/pxl8_font.h
index dec8429..82d1c20 100644
--- a/src/pxl8_font.h
+++ b/src/pxl8_font.h
@@ -122,8 +122,8 @@ static const pxl8_font pxl8_default_font = {
 extern "C" {
 #endif
 
-const pxl8_glyph* pxl8_font_find_glyph(const pxl8_font* font, u32 codepoint);
 pxl8_result pxl8_font_create_atlas(const pxl8_font* font, u8** atlas_data, i32* atlas_width, i32* atlas_height);
+const pxl8_glyph* pxl8_font_find_glyph(const pxl8_font* font, u32 codepoint);
 
 #ifdef __cplusplus
 }
diff --git a/src/pxl8_gfx.c b/src/pxl8_gfx.c
index 084a154..ab0cf62 100644
--- a/src/pxl8_gfx.c
+++ b/src/pxl8_gfx.c
@@ -153,6 +153,7 @@ void pxl8_gfx_shutdown(pxl8_gfx_ctx* ctx) {
     ctx->initialized = false;
 }
 
+// resource loading
 pxl8_result pxl8_gfx_init_atlas(pxl8_gfx_ctx* ctx, u32 width, u32 height) {
     if (!ctx || !ctx->initialized) return PXL8_ERROR_INVALID_ARGUMENT;
     
@@ -328,6 +329,7 @@ pxl8_result pxl8_gfx_load_font_atlas(pxl8_gfx_ctx* ctx) {
     return PXL8_OK;
 }
 
+// rendering pipeline
 void pxl8_gfx_upload_framebuffer(pxl8_gfx_ctx* ctx) {
     if (!ctx || !ctx->initialized || !ctx->framebuffer_texture) return;
     
@@ -405,6 +407,7 @@ void pxl8_gfx_project(pxl8_gfx_ctx* ctx, f32 left, f32 right, f32 top, f32 botto
     (void)ctx; (void)left; (void)right; (void)top; (void)bottom;
 }
 
+// drawing primitives
 void pxl8_clr(pxl8_gfx_ctx* ctx, u32 color) {
     if (!ctx || !ctx->framebuffer) return;
     
@@ -590,6 +593,7 @@ void pxl8_sprite(pxl8_gfx_ctx* ctx, u32 sprite_id, i32 x, i32 y, i32 w, i32 h) {
     }
 }
 
+// palette effects
 void pxl8_gfx_cycle_palette(pxl8_gfx_ctx* ctx, u8 start, u8 count, i32 step) {
     if (!ctx || !ctx->palette || count == 0) return;
     
diff --git a/src/pxl8_gfx.h b/src/pxl8_gfx.h
index bc3b2cd..5b33ab2 100644
--- a/src/pxl8_gfx.h
+++ b/src/pxl8_gfx.h
@@ -17,32 +17,30 @@ typedef struct pxl8_gfx_ctx {
     SDL_Texture* framebuffer_texture;
     SDL_Texture* sprite_atlas_texture;
     SDL_Window* window;
-    
+
     u8* framebuffer;
+    bool initialized;
     u32* palette;
     u32 palette_size;
-    
+
     i32 framebuffer_width;
     i32 framebuffer_height;
     pxl8_color_mode color_mode;
-    
+
+    u8* atlas;
+    bool atlas_dirty;
+    pxl8_atlas_entry* atlas_entries;
+    u32 atlas_entries_len;
+    u32 atlas_entries_cap;
+
     u32 sprite_atlas_width;
     u32 sprite_atlas_height;
     u32 sprite_frame_width;
     u32 sprite_frame_height;
     u32 sprite_frames_per_row;
-    
-    pxl8_atlas_entry* atlas_entries;
-    u32 atlas_entries_len;
-    u32 atlas_entries_cap;
-    
-    u8* atlas;
-    bool atlas_dirty;
-    
+
     i32 viewport_x, viewport_y;
     i32 viewport_width, viewport_height;
-    
-    bool initialized;
 } pxl8_gfx_ctx;
 
 typedef enum pxl8_blend_mode {
@@ -52,6 +50,14 @@ typedef enum pxl8_blend_mode {
     PXL8_BLEND_MULTIPLY
 } pxl8_blend_mode;
 
+typedef struct pxl8_mode7_params {
+    f32 horizon;
+    f32 scale_x, scale_y;
+    f32 rotation;
+    f32 offset_x, offset_y;
+    bool active;
+} pxl8_mode7_params;
+
 typedef struct pxl8_palette_cycle {
     u8 start_index;
     u8 end_index;
@@ -65,21 +71,17 @@ typedef struct pxl8_scanline_effect {
     bool active;
 } pxl8_scanline_effect;
 
-typedef struct pxl8_mode7_params {
-    f32 horizon;
-    f32 scale_x, scale_y;
-    f32 rotation;
-    f32 offset_x, offset_y;
-    bool active;
-} pxl8_mode7_params;
-
 typedef struct pxl8_effects {
     pxl8_palette_cycle palette_cycles[8];
     pxl8_scanline_effect scanline_effects[4];
-    
     f32 time;
 } pxl8_effects;
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void pxl8_gfx_get_resolution_dimensions(pxl8_resolution resolution, i32* width, i32* height);
 pxl8_result pxl8_gfx_init(
     pxl8_gfx_ctx* ctx,
     pxl8_color_mode mode,
@@ -88,36 +90,54 @@ pxl8_result pxl8_gfx_init(
     i32 window_width,
     i32 window_height
 );
-
-void pxl8_gfx_shutdown(pxl8_gfx_ctx* ctx);
-
 pxl8_result pxl8_gfx_init_atlas(pxl8_gfx_ctx* ctx, u32 width, u32 height);
-pxl8_result pxl8_gfx_load_sprite(pxl8_gfx_ctx* ctx, const char* path);
-pxl8_result pxl8_gfx_load_palette(pxl8_gfx_ctx* ctx, const char* path);
 pxl8_result pxl8_gfx_load_font_atlas(pxl8_gfx_ctx* ctx);
-
-void pxl8_gfx_get_resolution_dimensions(pxl8_resolution resolution, i32* width, i32* height);
-void pxl8_gfx_upload_framebuffer(pxl8_gfx_ctx* ctx);
-void pxl8_gfx_upload_atlas(pxl8_gfx_ctx* ctx);
+pxl8_result pxl8_gfx_load_palette(pxl8_gfx_ctx* ctx, const char* path);
+pxl8_result pxl8_gfx_load_sprite(pxl8_gfx_ctx* ctx, const char* path);
 void pxl8_gfx_present(pxl8_gfx_ctx* ctx);
-
-void pxl8_gfx_viewport(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 width, i32 height);
 void pxl8_gfx_project(pxl8_gfx_ctx* ctx, f32 left, f32 right, f32 top, f32 bottom);
+void pxl8_gfx_shutdown(pxl8_gfx_ctx* ctx);
+void pxl8_gfx_upload_atlas(pxl8_gfx_ctx* ctx);
+void pxl8_gfx_upload_framebuffer(pxl8_gfx_ctx* ctx);
+void pxl8_gfx_viewport(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 width, i32 height);
 
-void pxl8_clr(pxl8_gfx_ctx* ctx, u32 color);
-void pxl8_pixel(pxl8_gfx_ctx* ctx, i32 x, i32 y, u32 color);
-u32 pxl8_get_pixel(pxl8_gfx_ctx* ctx, i32 x, i32 y);
-void pxl8_line(pxl8_gfx_ctx* ctx, i32 x0, i32 y0, i32 x1, i32 y1, u32 color);
-void pxl8_rect(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 w, i32 h, u32 color);
-void pxl8_rect_fill(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 w, i32 h, u32 color);
-void pxl8_circle(pxl8_gfx_ctx* ctx, i32 cx, i32 cy, i32 radius, u32 color);
-void pxl8_circle_fill(pxl8_gfx_ctx* ctx, i32 cx, i32 cy, i32 radius, u32 color);
-void pxl8_text(pxl8_gfx_ctx* ctx, const char* text, i32 x, i32 y, u32 color);
-void pxl8_sprite(pxl8_gfx_ctx* ctx, u32 sprite_id, i32 x, i32 y, i32 w, i32 h);
-
-void pxl8_gfx_color_ramp(pxl8_gfx_ctx* ctx, u8 start, u8 count, u32 from_color, u32 to_color);
+void pxl8_gfx_color_ramp(
+    pxl8_gfx_ctx* ctx,
+    u8 start,
+    u8 count,
+    u32 from_color,
+    u32 to_color
+);
 void pxl8_gfx_cycle_palette(pxl8_gfx_ctx* ctx, u8 start, u8 count, i32 step);
-void pxl8_gfx_fade_palette(pxl8_gfx_ctx* ctx, u8 start, u8 count, f32 amount, u32 target_color);
-void pxl8_gfx_interpolate_palettes(pxl8_gfx_ctx* ctx, u32* palette1, u32* palette2, u8 start, u8 count, f32 t);
+void pxl8_gfx_fade_palette(
+    pxl8_gfx_ctx* ctx,
+    u8 start,
+    u8 count,
+    f32 amount,
+    u32 target_color
+);
+void pxl8_gfx_interpolate_palettes(
+    pxl8_gfx_ctx* ctx,
+    u32* palette1,
+    u32* palette2,
+    u8 start,
+    u8 count,
+    f32 t
+);
 void pxl8_gfx_process_effects(pxl8_gfx_ctx* ctx, pxl8_effects* effects, f32 dt);
 void pxl8_gfx_swap_palette(pxl8_gfx_ctx* ctx, u8 start, u8 count, u32* new_colors);
+
+void pxl8_circle(pxl8_gfx_ctx* ctx, i32 cx, i32 cy, i32 radius, u32 color);
+void pxl8_circle_fill(pxl8_gfx_ctx* ctx, i32 cx, i32 cy, i32 radius, u32 color);
+void pxl8_clr(pxl8_gfx_ctx* ctx, u32 color);
+u32 pxl8_get_pixel(pxl8_gfx_ctx* ctx, i32 x, i32 y);
+void pxl8_line(pxl8_gfx_ctx* ctx, i32 x0, i32 y0, i32 x1, i32 y1, u32 color);
+void pxl8_pixel(pxl8_gfx_ctx* ctx, i32 x, i32 y, u32 color);
+void pxl8_rect(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 w, i32 h, u32 color);
+void pxl8_rect_fill(pxl8_gfx_ctx* ctx, i32 x, i32 y, i32 w, i32 h, u32 color);
+void pxl8_sprite(pxl8_gfx_ctx* ctx, u32 sprite_id, i32 x, i32 y, i32 w, i32 h);
+void pxl8_text(pxl8_gfx_ctx* ctx, const char* text, i32 x, i32 y, u32 color);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/src/pxl8_io.h b/src/pxl8_io.h
index fe9557f..c15045c 100644
--- a/src/pxl8_io.h
+++ b/src/pxl8_io.h
@@ -11,17 +11,15 @@
 extern "C" {
 #endif
 
-pxl8_result pxl8_io_read_file(const char* path, char** content, size_t* size);
-pxl8_result pxl8_io_write_file(const char* path, const char* content, size_t size);
-pxl8_result pxl8_io_read_binary_file(const char* path, u8** data, size_t* size);
-pxl8_result pxl8_io_write_binary_file(const char* path, const u8* data, size_t size);
-
-bool pxl8_io_file_exists(const char* path);
-f64 pxl8_io_get_file_modified_time(const char* path);
 pxl8_result pxl8_io_create_directory(const char* path);
-
-void pxl8_io_free_file_content(char* content);
+bool pxl8_io_file_exists(const char* path);
 void pxl8_io_free_binary_data(u8* data);
+void pxl8_io_free_file_content(char* content);
+f64 pxl8_io_get_file_modified_time(const char* path);
+pxl8_result pxl8_io_read_binary_file(const char* path, u8** data, size_t* size);
+pxl8_result pxl8_io_read_file(const char* path, char** content, size_t* size);
+pxl8_result pxl8_io_write_binary_file(const char* path, const u8* data, size_t size);
+pxl8_result pxl8_io_write_file(const char* path, const char* content, size_t size);
 
 bool pxl8_key_down(const pxl8_input_state* input, i32 key);
 bool pxl8_key_pressed(const pxl8_input_state* input, i32 key);
diff --git a/src/pxl8_lua.c b/src/pxl8_lua.c
index fe87043..8a18ac2 100644
--- a/src/pxl8_lua.c
+++ b/src/pxl8_lua.c
@@ -104,9 +104,9 @@ static const char* pxl8_ffi_cdefs =
 "    float phase;\n"
 "    unsigned int color;\n"
 "    unsigned int fade_color;\n"
-"} pxl8_copper_bar;\n"
+"} pxl8_raster_bar;\n"
 "\n"
-"void pxl8_vfx_copper_bars(pxl8_gfx_ctx* ctx, pxl8_copper_bar* bars, u32 bar_count, f32 time);\n"
+"void pxl8_vfx_raster_bars(pxl8_gfx_ctx* ctx, pxl8_raster_bar* bars, u32 bar_count, f32 time);\n"
 "void pxl8_vfx_plasma(pxl8_gfx_ctx* ctx, f32 time, f32 scale1, f32 scale2, u8 palette_offset);\n"
 "void pxl8_vfx_rotozoom(pxl8_gfx_ctx* ctx, f32 angle, f32 zoom, i32 cx, i32 cy);\n"
 "void pxl8_vfx_tunnel(pxl8_gfx_ctx* ctx, f32 time, f32 speed, f32 twist);\n"
@@ -327,4 +327,3 @@ pxl8_result pxl8_lua_eval_fennel(lua_State* lua_state, const char* code) {
     lua_remove(lua_state, -2);
     return PXL8_OK;
 }
-
diff --git a/src/pxl8_lua.h b/src/pxl8_lua.h
index d7d872a..90a3667 100644
--- a/src/pxl8_lua.h
+++ b/src/pxl8_lua.h
@@ -13,12 +13,13 @@ extern "C" {
 
 pxl8_result pxl8_lua_init(lua_State** lua_state);
 void pxl8_lua_shutdown(lua_State* lua_state);
+pxl8_result pxl8_lua_setup_contexts(lua_State* lua_state, pxl8_gfx_ctx* gfx_ctx, pxl8_input_state* input);
+void pxl8_lua_setup_cart_path(lua_State* lua_state, const char* cart_path, const char* original_cwd);
+
 pxl8_result pxl8_lua_eval_fennel(lua_State* lua_state, const char* code);
 pxl8_result pxl8_lua_run_fennel_file(lua_State* lua_state, const char* filename);
 pxl8_result pxl8_lua_run_file(lua_State* lua_state, const char* filename);
 pxl8_result pxl8_lua_run_string(lua_State* lua_state, const char* code);
-pxl8_result pxl8_lua_setup_contexts(lua_State* lua_state, pxl8_gfx_ctx* gfx_ctx, pxl8_input_state* input);
-void pxl8_lua_setup_cart_path(lua_State* lua_state, const char* cart_path, const char* original_cwd);
 
 #ifdef __cplusplus
 }
diff --git a/src/pxl8_tilemap.c b/src/pxl8_tilemap.c
index f3ecf1e..ced7c65 100644
--- a/src/pxl8_tilemap.c
+++ b/src/pxl8_tilemap.c
@@ -192,8 +192,8 @@ void pxl8_tilemap_render_layer(const pxl8_tilemap* tilemap, pxl8_gfx_ctx* gfx, u
 
     u32 chunk_left = pxl8_max(0, view_left >> 4);
     u32 chunk_top = pxl8_max(0, view_top >> 4);
-    u32 chunk_right = pxl8_min((tilemap->width + 15) >> 4, (view_right >> 4) + 1);
-    u32 chunk_bottom = pxl8_min((tilemap->height + 15) >> 4, (view_bottom >> 4) + 1);
+    u32 chunk_right = pxl8_min((tilemap->width + 15) >> 4, (u32)((view_right >> 4) + 1));
+    u32 chunk_bottom = pxl8_min((tilemap->height + 15) >> 4, (u32)((view_bottom >> 4) + 1));
 
     for (u32 cy = chunk_top; cy < chunk_bottom; cy++) {
         for (u32 cx = chunk_left; cx < chunk_right; cx++) {
@@ -277,29 +277,6 @@ bool pxl8_tilemap_check_collision(const pxl8_tilemap* tilemap, i32 x, i32 y, i32
     return false;
 }
 
-pxl8_tilemap* pxl8_tilemap_new(u32 width, u32 height, u32 tile_size) {
-    pxl8_tilemap* tilemap = calloc(1, sizeof(pxl8_tilemap));
-    if (!tilemap) {
-        pxl8_error("Failed to allocate tilemap");
-        return NULL;
-    }
-
-    pxl8_result result = pxl8_tilemap_init(tilemap, width, height, tile_size);
-    if (result != PXL8_OK) {
-        pxl8_error("Failed to initialize tilemap");
-        free(tilemap);
-        return NULL;
-    }
-
-    return tilemap;
-}
-
-void pxl8_tilemap_destroy(pxl8_tilemap* tilemap) {
-    if (!tilemap) return;
-    pxl8_tilemap_free(tilemap);
-    free(tilemap);
-}
-
 u16 pxl8_tilemap_get_tile_id(const pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y) {
     if (!tilemap) return 0;
     pxl8_tile tile = pxl8_tilemap_get_tile(tilemap, layer, x, y);
diff --git a/src/pxl8_tilemap.h b/src/pxl8_tilemap.h
index d612cc5..2bc08b5 100644
--- a/src/pxl8_tilemap.h
+++ b/src/pxl8_tilemap.h
@@ -108,35 +108,56 @@ typedef struct pxl8_tilemap_view {
 extern "C" {
 #endif
 
-pxl8_result pxl8_tilemap_init(pxl8_tilemap* tilemap, u32 width, u32 height, u32 tile_size);
-pxl8_result pxl8_tilemap_set_tilesheet(pxl8_tilemap* tilemap, pxl8_tilesheet* tilesheet);
+bool pxl8_tilemap_check_collision(const pxl8_tilemap* tilemap, i32 x, i32 y, i32 w, i32 h);
+void pxl8_tilemap_compress(pxl8_tilemap* tilemap);
 void pxl8_tilemap_free(pxl8_tilemap* tilemap);
-
-pxl8_result pxl8_tilemap_set_tile(pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y, u16 tile_id, u8 flags);
+u32 pxl8_tilemap_get_memory_usage(const pxl8_tilemap* tilemap);
 pxl8_tile pxl8_tilemap_get_tile(const pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y);
-
-void pxl8_tilemap_set_camera(pxl8_tilemap* tilemap, i32 x, i32 y);
-void pxl8_tilemap_get_view(const pxl8_tilemap* tilemap, const pxl8_gfx_ctx* gfx, pxl8_tilemap_view* view);
-
+u16 pxl8_tilemap_get_tile_id(const pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y);
+void pxl8_tilemap_get_view(
+    const pxl8_tilemap* tilemap,
+    const pxl8_gfx_ctx* gfx,
+    pxl8_tilemap_view* view
+);
+pxl8_result pxl8_tilemap_init(pxl8_tilemap* tilemap, u32 width, u32 height, u32 tile_size);
+bool pxl8_tilemap_is_solid(const pxl8_tilemap* tilemap, u32 x, u32 y);
 void pxl8_tilemap_render(const pxl8_tilemap* tilemap, pxl8_gfx_ctx* gfx);
 void pxl8_tilemap_render_layer(const pxl8_tilemap* tilemap, pxl8_gfx_ctx* gfx, u32 layer);
-void pxl8_tilemap_render_tile(const pxl8_tilemap* tilemap, pxl8_gfx_ctx* gfx, u16 tile_id, i32 x, i32 y, u8 flags);
-
-bool pxl8_tilemap_is_solid(const pxl8_tilemap* tilemap, u32 x, u32 y);
-bool pxl8_tilemap_check_collision(const pxl8_tilemap* tilemap, i32 x, i32 y, i32 w, i32 h);
-
-pxl8_tilemap* pxl8_tilemap_new(u32 width, u32 height, u32 tile_size);
-void pxl8_tilemap_destroy(pxl8_tilemap* tilemap);
-u16 pxl8_tilemap_get_tile_id(const pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y);
-
+void pxl8_tilemap_render_tile(
+    const pxl8_tilemap* tilemap,
+    pxl8_gfx_ctx* gfx,
+    u16 tile_id,
+    i32 x,
+    i32 y,
+    u8 flags
+);
+void pxl8_tilemap_set_camera(pxl8_tilemap* tilemap, i32 x, i32 y);
+pxl8_result pxl8_tilemap_set_tile(
+    pxl8_tilemap* tilemap,
+    u32 layer,
+    u32 x,
+    u32 y,
+    u16 tile_id,
+    u8 flags
+);
+pxl8_result pxl8_tilemap_set_tile_auto(
+    pxl8_tilemap* tilemap,
+    u32 layer,
+    u32 x,
+    u32 y,
+    u16 base_tile_id,
+    u8 flags
+);
+pxl8_result pxl8_tilemap_set_tilesheet(pxl8_tilemap* tilemap, pxl8_tilesheet* tilesheet);
 void pxl8_tilemap_update(pxl8_tilemap* tilemap, f32 delta_time);
-
-pxl8_result pxl8_tilemap_set_tile_auto(pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y,
-                                       u16 base_tile_id, u8 flags);
-void pxl8_tilemap_update_autotiles(pxl8_tilemap* tilemap, u32 layer, u32 x, u32 y, u32 w, u32 h);
-
-u32 pxl8_tilemap_get_memory_usage(const pxl8_tilemap* tilemap);
-void pxl8_tilemap_compress(pxl8_tilemap* tilemap);
+void pxl8_tilemap_update_autotiles(
+    pxl8_tilemap* tilemap,
+    u32 layer,
+    u32 x,
+    u32 y,
+    u32 w,
+    u32 h
+);
 
 #ifdef __cplusplus
 }
diff --git a/src/pxl8_tilesheet.c b/src/pxl8_tilesheet.c
index a9ecb46..1bbc686 100644
--- a/src/pxl8_tilesheet.c
+++ b/src/pxl8_tilesheet.c
@@ -5,16 +5,6 @@
 #include <stdlib.h>
 #include <string.h>
 
-pxl8_result pxl8_tilesheet_init(pxl8_tilesheet* tilesheet, u32 tile_size) {
-    if (!tilesheet) return PXL8_ERROR_NULL_POINTER;
-
-    memset(tilesheet, 0, sizeof(pxl8_tilesheet));
-    tilesheet->tile_size = tile_size ? tile_size : PXL8_TILE_SIZE;
-    tilesheet->ref_count = 1;
-
-    return PXL8_OK;
-}
-
 void pxl8_tilesheet_free(pxl8_tilesheet* tilesheet) {
     if (!tilesheet) return;
 
@@ -186,28 +176,6 @@ bool pxl8_tilesheet_is_tile_valid(const pxl8_tilesheet* tilesheet, u16 tile_id)
     return tilesheet->tile_valid ? tilesheet->tile_valid[tile_id] : true;
 }
 
-pxl8_tilesheet* pxl8_tilesheet_new(u32 tile_size) {
-    pxl8_tilesheet* tilesheet = calloc(1, sizeof(pxl8_tilesheet));
-    if (!tilesheet) {
-        pxl8_error("Failed to allocate tilesheet");
-        return NULL;
-    }
-
-    pxl8_result result = pxl8_tilesheet_init(tilesheet, tile_size);
-    if (result != PXL8_OK) {
-        pxl8_error("Failed to initialize tilesheet");
-        free(tilesheet);
-        return NULL;
-    }
-
-    return tilesheet;
-}
-
-void pxl8_tilesheet_destroy(pxl8_tilesheet* tilesheet) {
-    if (!tilesheet) return;
-    pxl8_tilesheet_unref(tilesheet);
-}
-
 void pxl8_tilesheet_ref(pxl8_tilesheet* tilesheet) {
     if (!tilesheet) return;
     tilesheet->ref_count++;
@@ -218,7 +186,6 @@ void pxl8_tilesheet_unref(pxl8_tilesheet* tilesheet) {
 
     if (--tilesheet->ref_count == 0) {
         pxl8_tilesheet_free(tilesheet);
-        free(tilesheet);
     }
 }
 
diff --git a/src/pxl8_tilesheet.h b/src/pxl8_tilesheet.h
index b7432df..fd94bf2 100644
--- a/src/pxl8_tilesheet.h
+++ b/src/pxl8_tilesheet.h
@@ -31,33 +31,44 @@ typedef struct pxl8_tilesheet {
 extern "C" {
 #endif
 
-pxl8_result pxl8_tilesheet_init(pxl8_tilesheet* tilesheet, u32 tile_size);
-pxl8_result pxl8_tilesheet_load(pxl8_tilesheet* tilesheet, const char* filepath, pxl8_gfx_ctx* gfx);
-void pxl8_tilesheet_free(pxl8_tilesheet* tilesheet);
-
-void pxl8_tilesheet_render_tile(const pxl8_tilesheet* tilesheet, pxl8_gfx_ctx* gfx,
-                                u16 tile_id, i32 x, i32 y, u8 flags);
-
-bool pxl8_tilesheet_is_tile_valid(const pxl8_tilesheet* tilesheet, u16 tile_id);
-
-pxl8_tilesheet* pxl8_tilesheet_new(u32 tile_size);
-void pxl8_tilesheet_destroy(pxl8_tilesheet* tilesheet);
-
-void pxl8_tilesheet_ref(pxl8_tilesheet* tilesheet);
-void pxl8_tilesheet_unref(pxl8_tilesheet* tilesheet);
-
-pxl8_result pxl8_tilesheet_add_animation(pxl8_tilesheet* tilesheet, u16 base_tile_id,
-                                         const u16* frames, u16 frame_count, f32 frame_duration);
-void pxl8_tilesheet_update_animations(pxl8_tilesheet* tilesheet, f32 delta_time);
-u16 pxl8_tilesheet_get_animated_frame(const pxl8_tilesheet* tilesheet, u16 tile_id);
-
-void pxl8_tilesheet_set_tile_property(pxl8_tilesheet* tilesheet, u16 tile_id,
-                                      const pxl8_tile_properties* props);
-const pxl8_tile_properties* pxl8_tilesheet_get_tile_property(const pxl8_tilesheet* tilesheet, u16 tile_id);
-
-pxl8_result pxl8_tilesheet_add_autotile_rule(pxl8_tilesheet* tilesheet, u16 base_tile_id,
-                                             u8 neighbor_mask, u16 result_tile_id);
+pxl8_result pxl8_tilesheet_add_animation(
+    pxl8_tilesheet* tilesheet,
+    u16 base_tile_id,
+    const u16* frames,
+    u16 frame_count,
+    f32 frame_duration
+);
+pxl8_result pxl8_tilesheet_add_autotile_rule(
+    pxl8_tilesheet* tilesheet,
+    u16 base_tile_id,
+    u8 neighbor_mask,
+    u16 result_tile_id
+);
 u16 pxl8_tilesheet_apply_autotile(const pxl8_tilesheet* tilesheet, u16 base_tile_id, u8 neighbors);
+void pxl8_tilesheet_free(pxl8_tilesheet* tilesheet);
+u16 pxl8_tilesheet_get_animated_frame(const pxl8_tilesheet* tilesheet, u16 tile_id);
+const pxl8_tile_properties* pxl8_tilesheet_get_tile_property(
+    const pxl8_tilesheet* tilesheet,
+    u16 tile_id
+);
+bool pxl8_tilesheet_is_tile_valid(const pxl8_tilesheet* tilesheet, u16 tile_id);
+pxl8_result pxl8_tilesheet_load(pxl8_tilesheet* tilesheet, const char* filepath, pxl8_gfx_ctx* gfx);
+void pxl8_tilesheet_ref(pxl8_tilesheet* tilesheet);
+void pxl8_tilesheet_render_tile(
+    const pxl8_tilesheet* tilesheet,
+    pxl8_gfx_ctx* gfx,
+    u16 tile_id,
+    i32 x,
+    i32 y,
+    u8 flags
+);
+void pxl8_tilesheet_set_tile_property(
+    pxl8_tilesheet* tilesheet,
+    u16 tile_id,
+    const pxl8_tile_properties* props
+);
+void pxl8_tilesheet_unref(pxl8_tilesheet* tilesheet);
+void pxl8_tilesheet_update_animations(pxl8_tilesheet* tilesheet, f32 delta_time);
 
 #ifdef __cplusplus
 }
diff --git a/src/pxl8_types.h b/src/pxl8_types.h
index b1a8edb..60d4022 100644
--- a/src/pxl8_types.h
+++ b/src/pxl8_types.h
@@ -1,8 +1,8 @@
 #pragma once
 
+#include <SDL3/SDL.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <SDL3/SDL.h>
 
 typedef uint8_t  u8;
 typedef uint16_t u16;
@@ -21,13 +21,28 @@ typedef __int128_t  i128;
 #endif
 
 typedef enum pxl8_color_mode {
-    PXL8_COLOR_MODE_FAMI,       // NES-style 4 colors per sprite, 64 color palette
-    PXL8_COLOR_MODE_MEGA,       // Genesis-style 64 colors, 512 color palette  
-    PXL8_COLOR_MODE_GBA,        // GBA-style 64 colors, 32K color palette
-    PXL8_COLOR_MODE_SUPERFAMI,  // SNES-style 256 colors, 32K color palette
-    PXL8_COLOR_MODE_HICOLOR,    // 16-bit high color mode
+    PXL8_COLOR_MODE_FAMI,
+    PXL8_COLOR_MODE_MEGA,
+    PXL8_COLOR_MODE_GBA,
+    PXL8_COLOR_MODE_SUPERFAMI,
+    PXL8_COLOR_MODE_HICOLOR,
 } pxl8_color_mode;
 
+typedef enum pxl8_resolution {
+    PXL8_RESOLUTION_240x160,
+    PXL8_RESOLUTION_320x180,
+    PXL8_RESOLUTION_320x240,
+    PXL8_RESOLUTION_640x360,
+    PXL8_RESOLUTION_640x480,
+    PXL8_RESOLUTION_800x600,
+    PXL8_RESOLUTION_960x540,
+} pxl8_resolution;
+
+typedef struct pxl8_input_state {
+    bool keys[256];
+    bool keys_pressed[256];
+} pxl8_input_state;
+
 typedef struct pxl8_point {
     i32 x, y;
 } pxl8_point;
@@ -55,18 +70,3 @@ typedef enum pxl8_result {
     PXL8_ERROR_ASE_TRUNCATED_FILE,
     PXL8_ERROR_ASE_MALFORMED_CHUNK,
 } pxl8_result;
-
-typedef enum pxl8_resolution {
-    PXL8_RESOLUTION_240x160,
-    PXL8_RESOLUTION_320x180,
-    PXL8_RESOLUTION_320x240,
-    PXL8_RESOLUTION_640x360,
-    PXL8_RESOLUTION_640x480,
-    PXL8_RESOLUTION_800x600,
-    PXL8_RESOLUTION_960x540,
-} pxl8_resolution;
-
-typedef struct pxl8_input_state {
-    bool keys[256];
-    bool keys_pressed[256];
-} pxl8_input_state;
diff --git a/src/pxl8_vfx.c b/src/pxl8_vfx.c
index 119bf06..2b598a6 100644
--- a/src/pxl8_vfx.c
+++ b/src/pxl8_vfx.c
@@ -4,31 +4,6 @@
 #include <stdlib.h>
 #include <SDL3/SDL.h>
 
-void pxl8_vfx_copper_bars(pxl8_gfx_ctx* ctx, pxl8_copper_bar* bars, u32 bar_count, f32 time) {
-    if (!ctx || !bars) return;
-    
-    for (u32 i = 0; i < bar_count; i++) {
-        pxl8_copper_bar* bar = &bars[i];
-        f32 y = bar->base_y + bar->amplitude * sinf(time * bar->speed + bar->phase);
-        i32 y_int = (i32)y;
-        
-        for (i32 dy = 0; dy <= bar->height; dy++) {
-            f32 position = (f32)dy / (f32)bar->height;
-            f32 gradient = 1.0f - 2.0f * fabsf(position - 0.5f);
-            
-            u8 color_idx;
-            if (gradient > 0.8f) {
-                color_idx = bar->fade_color;
-            } else {
-                u8 range = bar->fade_color - bar->color;
-                color_idx = bar->color + (u8)(gradient * range);
-            }
-            
-            pxl8_rect_fill(ctx, 0, y_int + dy, ctx->framebuffer_width, 1, color_idx);
-        }
-    }
-}
-
 void pxl8_vfx_plasma(pxl8_gfx_ctx* ctx, f32 time, f32 scale1, f32 scale2, u8 palette_offset) {
     if (!ctx || !ctx->framebuffer) return;
     
@@ -50,6 +25,31 @@ void pxl8_vfx_plasma(pxl8_gfx_ctx* ctx, f32 time, f32 scale1, f32 scale2, u8 pal
     }
 }
 
+void pxl8_vfx_raster_bars(pxl8_gfx_ctx* ctx, pxl8_raster_bar* bars, u32 bar_count, f32 time) {
+    if (!ctx || !bars) return;
+    
+    for (u32 i = 0; i < bar_count; i++) {
+        pxl8_raster_bar* bar = &bars[i];
+        f32 y = bar->base_y + bar->amplitude * sinf(time * bar->speed + bar->phase);
+        i32 y_int = (i32)y;
+        
+        for (i32 dy = 0; dy <= bar->height; dy++) {
+            f32 position = (f32)dy / (f32)bar->height;
+            f32 gradient = 1.0f - 2.0f * fabsf(position - 0.5f);
+            
+            u8 color_idx;
+            if (gradient > 0.8f) {
+                color_idx = bar->fade_color;
+            } else {
+                u8 range = bar->fade_color - bar->color;
+                color_idx = bar->color + (u8)(gradient * range);
+            }
+            
+            pxl8_rect_fill(ctx, 0, y_int + dy, ctx->framebuffer_width, 1, color_idx);
+        }
+    }
+}
+
 void pxl8_vfx_rotozoom(pxl8_gfx_ctx* ctx, f32 angle, f32 zoom, i32 cx, i32 cy) {
     if (!ctx || !ctx->framebuffer) return;
     
@@ -141,15 +141,16 @@ void pxl8_vfx_water_ripple(pxl8_gfx_ctx* ctx, f32* height_map, i32 drop_x, i32 d
 
 void pxl8_vfx_particles_clear(pxl8_particle_system* sys) {
     if (!sys || !sys->particles) return;
-    
+
     for (u32 i = 0; i < sys->max_count; i++) {
         sys->particles[i].life = 0;
         sys->particles[i].flags = 0;
     }
     sys->alive_count = 0;
+    sys->spawn_timer = 0;
 }
 
-void pxl8_vfx_particles_destroy(pxl8_particle_system* sys) {
+void pxl8_vfx_particles_free(pxl8_particle_system* sys) {
     if (!sys) return;
     
     if (sys->particles) {
@@ -272,13 +273,14 @@ void pxl8_vfx_particles_update(pxl8_particle_system* sys, f32 dt) {
 
 void pxl8_vfx_explosion(pxl8_particle_system* sys, i32 x, i32 y, u32 color, f32 force) {
     if (!sys) return;
-    
+
     sys->x = x;
     sys->y = y;
     sys->spread_x = sys->spread_y = 2.0f;
     sys->gravity_x = 0;
     sys->gravity_y = 200.0f;
     sys->drag = 0.95f;
+    sys->update_fn = NULL;
     
     for (u32 i = 0; i < 50 && i < sys->max_count; i++) {
         pxl8_particle* p = &sys->particles[i];
@@ -353,7 +355,7 @@ static void rain_spawn(pxl8_particle* p, void* userdata) {
 
 void pxl8_vfx_rain(pxl8_particle_system* sys, i32 width, f32 wind) {
     if (!sys) return;
-    
+
     sys->x = width / 2.0f;
     sys->y = -10;
     sys->spread_x = width;
@@ -363,6 +365,7 @@ void pxl8_vfx_rain(pxl8_particle_system* sys, i32 width, f32 wind) {
     sys->drag = 1.0f;
     sys->spawn_rate = 100.0f;
     sys->spawn_fn = rain_spawn;
+    sys->update_fn = NULL;
 }
 
 static void smoke_spawn(pxl8_particle* p, void* userdata) {
@@ -388,12 +391,13 @@ void pxl8_vfx_smoke(pxl8_particle_system* sys, i32 x, i32 y, u8 color) {
     sys->drag = 0.96f;
     sys->spawn_rate = 20.0f;
     sys->spawn_fn = smoke_spawn;
+    sys->update_fn = NULL;
     sys->userdata = (void*)(uintptr_t)color;
 }
 
 static void snow_spawn(pxl8_particle* p, void* userdata) {
     (void)userdata;
-    p->start_color = 15 + (rand() % 2);
+    p->start_color = 8 + (rand() % 3);
     p->end_color = 10;
     p->color = p->start_color;
     p->max_life = 4.0f;
@@ -403,16 +407,17 @@ static void snow_spawn(pxl8_particle* p, void* userdata) {
 
 void pxl8_vfx_snow(pxl8_particle_system* sys, i32 width, f32 wind) {
     if (!sys) return;
-    
+
     sys->x = width / 2.0f;
     sys->y = -10;
     sys->spread_x = width;
     sys->spread_y = 0;
     sys->gravity_x = wind;
     sys->gravity_y = 30.0f;
-    sys->drag = 0.99f;
+    sys->drag = 1.0f;
     sys->spawn_rate = 30.0f;
     sys->spawn_fn = snow_spawn;
+    sys->update_fn = NULL;
 }
 
 static void sparks_spawn(pxl8_particle* p, void* userdata) {
@@ -440,6 +445,7 @@ void pxl8_vfx_sparks(pxl8_particle_system* sys, i32 x, i32 y, u32 color) {
     sys->drag = 0.97f;
     sys->spawn_rate = 40.0f;
     sys->spawn_fn = sparks_spawn;
+    sys->update_fn = NULL;
     sys->userdata = (void*)(uintptr_t)color;
 }
 
@@ -450,6 +456,7 @@ void pxl8_vfx_starfield(pxl8_particle_system* sys, f32 speed, f32 spread) {
     sys->gravity_x = sys->gravity_y = 0;
     sys->drag = 1.0f;
     sys->spawn_rate = 0;
+    sys->update_fn = NULL;
     
     for (u32 i = 0; i < sys->max_count; i++) {
         pxl8_particle* p = &sys->particles[i];
diff --git a/src/pxl8_vfx.h b/src/pxl8_vfx.h
index 05aaa39..ab870a4 100644
--- a/src/pxl8_vfx.h
+++ b/src/pxl8_vfx.h
@@ -3,16 +3,6 @@
 #include "pxl8_types.h"
 #include "pxl8_gfx.h"
 
-typedef struct pxl8_copper_bar {
-    f32 base_y;
-    f32 amplitude;
-    i32 height;
-    f32 speed;
-    f32 phase;
-    u32 color;
-    u32 fade_color;
-} pxl8_copper_bar;
-
 typedef struct pxl8_particle {
     f32 x, y, z;
     f32 vx, vy, vz;
@@ -46,15 +36,19 @@ typedef struct pxl8_particle_system {
     void* userdata;
 } pxl8_particle_system;
 
-void pxl8_vfx_copper_bars(pxl8_gfx_ctx* ctx, pxl8_copper_bar* bars, u32 bar_count, f32 time);
-void pxl8_vfx_plasma(pxl8_gfx_ctx* ctx, f32 time, f32 scale1, f32 scale2, u8 palette_offset);
-void pxl8_vfx_rotozoom(pxl8_gfx_ctx* ctx, f32 angle, f32 zoom, i32 cx, i32 cy);
-void pxl8_vfx_tunnel(pxl8_gfx_ctx* ctx, f32 time, f32 speed, f32 twist);
-void pxl8_vfx_water_ripple(pxl8_gfx_ctx* ctx, f32* height_map, i32 drop_x, i32 drop_y, f32 damping);
+typedef struct pxl8_raster_bar {
+    f32 base_y;
+    f32 amplitude;
+    i32 height;
+    f32 speed;
+    f32 phase;
+    u32 color;
+    u32 fade_color;
+} pxl8_raster_bar;
 
 void pxl8_vfx_particles_clear(pxl8_particle_system* sys);
-void pxl8_vfx_particles_destroy(pxl8_particle_system* sys);
 void pxl8_vfx_particles_emit(pxl8_particle_system* sys, u32 count);
+void pxl8_vfx_particles_free(pxl8_particle_system* sys);
 void pxl8_vfx_particles_init(pxl8_particle_system* sys, u32 max_count);
 void pxl8_vfx_particles_render(pxl8_particle_system* sys, pxl8_gfx_ctx* ctx);
 void pxl8_vfx_particles_update(pxl8_particle_system* sys, f32 dt);
@@ -66,3 +60,9 @@ void pxl8_vfx_smoke(pxl8_particle_system* sys, i32 x, i32 y, u8 color);
 void pxl8_vfx_snow(pxl8_particle_system* sys, i32 width, f32 wind);
 void pxl8_vfx_sparks(pxl8_particle_system* sys, i32 x, i32 y, u32 color);
 void pxl8_vfx_starfield(pxl8_particle_system* sys, f32 speed, f32 spread);
+
+void pxl8_vfx_plasma(pxl8_gfx_ctx* ctx, f32 time, f32 scale1, f32 scale2, u8 palette_offset);
+void pxl8_vfx_raster_bars(pxl8_gfx_ctx* ctx, pxl8_raster_bar* bars, u32 bar_count, f32 time);
+void pxl8_vfx_rotozoom(pxl8_gfx_ctx* ctx, f32 angle, f32 zoom, i32 cx, i32 cy);
+void pxl8_vfx_tunnel(pxl8_gfx_ctx* ctx, f32 time, f32 speed, f32 twist);
+void pxl8_vfx_water_ripple(pxl8_gfx_ctx* ctx, f32* height_map, i32 drop_x, i32 drop_y, f32 damping);