diff --git a/demo/main.fnl b/demo/main.fnl
index 6dc7541..10116c3 100644
--- a/demo/main.fnl
+++ b/demo/main.fnl
@@ -16,8 +16,8 @@
 (var logo-sprite nil)
 
 (global init (fn []
-  (pxl8.load_palette "sprites/pxl8_logo.ase")
-  (set logo-sprite (pxl8.load_sprite "sprites/pxl8_logo.ase"))
+  (pxl8.load_palette "res/sprites/pxl8_logo.ase")
+  (set logo-sprite (pxl8.load_sprite "res/sprites/pxl8_logo.ase"))
   (set particles (pxl8.particles_new 1000))))
 
 (global update (fn [dt]
@@ -44,7 +44,7 @@
     (set current-effect 8))
   (when (pxl8.key_pressed "9")
     (set use-nes-palette (not use-nes-palette))
-    (local palette-path (if use-nes-palette "palettes/nes.ase" "sprites/pxl8_logo.ase"))
+    (local palette-path (if use-nes-palette "res/palettes/nes.ase" "res/sprites/pxl8_logo.ase"))
     (pxl8.load_palette palette-path))
 
   (case current-effect
diff --git a/demo/mod/cube3d.fnl b/demo/mod/cube3d.fnl
index 606e29b..094f6d3 100644
--- a/demo/mod/cube3d.fnl
+++ b/demo/mod/cube3d.fnl
@@ -26,8 +26,8 @@
 
 (fn init-texture []
   (when (not texture-initialized)
-    (pxl8.load_palette "sprites/pxl8_logo.ase")
-    (set texture-id (pxl8.load_sprite "sprites/pxl8_logo.ase"))
+    (pxl8.load_palette "res/sprites/pxl8_logo.ase")
+    (set texture-id (pxl8.load_sprite "res/sprites/pxl8_logo.ase"))
     (pxl8.upload_atlas)
     (set texture-initialized true)))
 
@@ -71,37 +71,57 @@
     (set fps-accumulator 0)
     (set fps-frame-count 0))
 
-  (let [wheel-y (pxl8.mouse_wheel_y)
-        zoom-speed 0.5]
-    (when (not= wheel-y 0)
-      (let [forward-x (* (math.sin cam-yaw) wheel-y zoom-speed)
-            forward-z (* (math.cos cam-yaw) wheel-y zoom-speed)]
-        (set cam-x (+ cam-x forward-x))
-        (set cam-z (- cam-z forward-z)))))
+  (let [wheel-y (pxl8.mouse_wheel_y)]
+    (when (and (not= wheel-y 0) (not (pxl8.ui_has_mouse_focus)))
+      (if orthographic
+          (set zoom (math.max 0.5 (math.min (- zoom (* wheel-y 0.2)) 10.0)))
+          (let [zoom-speed 0.5
+                forward-x (* (math.sin cam-yaw) wheel-y zoom-speed)
+                forward-z (* (math.cos cam-yaw) wheel-y zoom-speed)]
+            (set cam-x (+ cam-x forward-x))
+            (set cam-z (- cam-z forward-z))))))
 
   (let [move-speed 5.0
         rot-speed 2.0
+        zoom-speed 2.0
         forward-x (* (math.sin cam-yaw) move-speed dt)
         forward-z (* (math.cos cam-yaw) move-speed dt)
         right-x (* (math.cos cam-yaw) move-speed dt)
         right-z (* (- (math.sin cam-yaw)) move-speed dt)]
 
-    (when (pxl8.key_down "w")
-      (set cam-x (+ cam-x forward-x))
-      (set cam-z (- cam-z forward-z)))
-    (when (pxl8.key_down "s")
-      (set cam-x (- cam-x forward-x))
-      (set cam-z (+ cam-z forward-z)))
-    (when (pxl8.key_down "a")
-      (set cam-x (- cam-x right-x))
-      (set cam-z (- cam-z right-z)))
-    (when (pxl8.key_down "d")
-      (set cam-x (+ cam-x right-x))
-      (set cam-z (+ cam-z right-z)))
-    (when (pxl8.key_down "q")
-      (set cam-y (- cam-y (* move-speed dt))))
-    (when (pxl8.key_down "e")
-      (set cam-y (+ cam-y (* move-speed dt))))
+    (if orthographic
+        (do
+          (when (pxl8.key_down "w")
+            (set zoom (math.max 0.5 (- zoom (* zoom-speed dt)))))
+          (when (pxl8.key_down "s")
+            (set zoom (math.min 10.0 (+ zoom (* zoom-speed dt)))))
+          (when (pxl8.key_down "a")
+            (set cam-x (- cam-x right-x))
+            (set cam-z (- cam-z right-z)))
+          (when (pxl8.key_down "d")
+            (set cam-x (+ cam-x right-x))
+            (set cam-z (+ cam-z right-z)))
+          (when (pxl8.key_down "q")
+            (set cam-y (- cam-y (* move-speed dt))))
+          (when (pxl8.key_down "e")
+            (set cam-y (+ cam-y (* move-speed dt)))))
+        (do
+          (when (pxl8.key_down "w")
+            (set cam-x (+ cam-x forward-x))
+            (set cam-z (- cam-z forward-z)))
+          (when (pxl8.key_down "s")
+            (set cam-x (- cam-x forward-x))
+            (set cam-z (+ cam-z forward-z)))
+          (when (pxl8.key_down "a")
+            (set cam-x (- cam-x right-x))
+            (set cam-z (- cam-z right-z)))
+          (when (pxl8.key_down "d")
+            (set cam-x (+ cam-x right-x))
+            (set cam-z (+ cam-z right-z)))
+          (when (pxl8.key_down "q")
+            (set cam-y (- cam-y (* move-speed dt))))
+          (when (pxl8.key_down "e")
+            (set cam-y (+ cam-y (* move-speed dt))))))
 
     (when (pxl8.key_down "left")
       (set cam-yaw (- cam-yaw (* rot-speed dt))))
@@ -144,7 +164,7 @@
   (pxl8.set_wireframe wireframe)
 
   (if orthographic
-      (let [size 2.5
+      (let [size zoom
             aspect (/ (pxl8.get_width) (pxl8.get_height))
             w (* size aspect)
             h size]
diff --git a/demo/mod/debug_ui.fnl b/demo/mod/debug_ui.fnl
index eadc6f8..cfa43b3 100644
--- a/demo/mod/debug_ui.fnl
+++ b/demo/mod/debug_ui.fnl
@@ -3,8 +3,7 @@
 (fn render [state]
   (var new-state {})
   (when state.show-debug-ui
-    (let [window-h (if state.use-texture 210 180)
-          window-open (pxl8.ui_window_begin "Debug Menu (F8)" 10 10 250 window-h)]
+    (let [window-open (pxl8.ui_window_begin "Debug Menu (F8)" 10 10 256 128)]
       (when window-open
         (pxl8.ui_layout_row 1 0 0)
         (pxl8.ui_label (string.format "FPS: %.0f" (or state.fps 0)))
diff --git a/demo/palettes/gruvbox.ase b/demo/palettes/gruvbox.ase
deleted file mode 100644
index d667cb4..0000000
Binary files a/demo/palettes/gruvbox.ase and /dev/null differ
diff --git a/demo/palettes/nes.ase b/demo/res/palettes/nes.ase
similarity index 100%
rename from demo/palettes/nes.ase
rename to demo/res/palettes/nes.ase
diff --git a/demo/sprites/pxl8_icon.ase b/demo/res/sprites/pxl8_icon.ase
similarity index 100%
rename from demo/sprites/pxl8_icon.ase
rename to demo/res/sprites/pxl8_icon.ase
diff --git a/demo/sprites/pxl8_logo.ase b/demo/res/sprites/pxl8_logo.ase
similarity index 100%
rename from demo/sprites/pxl8_logo.ase
rename to demo/res/sprites/pxl8_logo.ase
diff --git a/src/lua/pxl8.lua b/src/lua/pxl8.lua
index 92d043f..4bb956e 100644
--- a/src/lua/pxl8.lua
+++ b/src/lua/pxl8.lua
@@ -2,6 +2,7 @@ local ffi = require("ffi")
 local C = ffi.C
 local gfx = _pxl8_gfx
 local input = _pxl8_input
+local ui = _pxl8_ui
 
 -- pxl8 lua api
 --
@@ -369,30 +370,30 @@ function pxl8.mat4_lookat(eye, center, up)
     return C.pxl8_mat4_lookat(eye_vec, center_vec, up_vec)
 end
 
-pxl8.gfx = gfx
-pxl8.input = input
-pxl8.ui = _pxl8_ui
-
 function pxl8.bounds(x, y, w, h)
     return ffi.new("pxl8_bounds", {x = x, y = y, w = w, h = h})
 end
 
 function pxl8.ui_button(label)
-    return C.pxl8_ui_button(_pxl8_ui, label)
+    return C.pxl8_ui_button(ui, label)
 end
 
 function pxl8.ui_checkbox(label, state)
     local state_ptr = ffi.new("bool[1]", state)
-    local changed = C.pxl8_ui_checkbox(_pxl8_ui, label, state_ptr)
+    local changed = C.pxl8_ui_checkbox(ui, label, state_ptr)
     return changed, state_ptr[0]
 end
 
+function pxl8.ui_has_mouse_focus()
+    return C.pxl8_ui_has_mouse_focus(ui)
+end
+
 function pxl8.ui_indent(amount)
-    C.pxl8_ui_indent(_pxl8_ui, amount)
+    C.pxl8_ui_indent(ui, amount)
 end
 
 function pxl8.ui_label(text)
-    C.pxl8_ui_label(_pxl8_ui, text)
+    C.pxl8_ui_label(ui, text)
 end
 
 function pxl8.ui_layout_row(item_count, widths, height)
@@ -402,20 +403,20 @@ function pxl8.ui_layout_row(item_count, widths, height)
     elseif type(widths) == "number" then
         widths_array = ffi.new("int[1]", widths)
     end
-    C.pxl8_ui_layout_row(_pxl8_ui, item_count, widths_array, height)
+    C.pxl8_ui_layout_row(ui, item_count, widths_array, height)
 end
 
 function pxl8.ui_window_begin(title, x, y, w, h, options)
     local rect = ffi.new("pxl8_bounds", {x = x, y = y, w = w, h = h})
-    return C.pxl8_ui_window_begin(_pxl8_ui, title, rect, options or 0)
+    return C.pxl8_ui_window_begin(ui, title, rect, options or 0)
 end
 
 function pxl8.ui_window_end()
-    C.pxl8_ui_window_end(_pxl8_ui)
+    C.pxl8_ui_window_end(ui)
 end
 
 function pxl8.ui_window_set_open(title, open)
-    C.pxl8_ui_window_set_open(_pxl8_ui, title, open)
+    C.pxl8_ui_window_set_open(ui, title, open)
 end
 
 return pxl8
diff --git a/src/pxl8.c b/src/pxl8.c
index 47ce57c..dd34d04 100644
--- a/src/pxl8.c
+++ b/src/pxl8.c
@@ -334,6 +334,9 @@ SDL_AppResult SDL_AppIterate(void* appstate) {
 
     if (app->ui) {
         pxl8_ui_input_mousemove(app->ui, app->input.mouse_x, app->input.mouse_y);
+        if (app->input.mouse_wheel_x != 0 || app->input.mouse_wheel_y != 0) {
+            pxl8_ui_input_scroll(app->ui, app->input.mouse_wheel_x * 10, -app->input.mouse_wheel_y * 10);
+        }
 
         pxl8_ui_frame_begin(app->ui);
 
diff --git a/src/pxl8_script.c b/src/pxl8_script.c
index 91f684f..2045d36 100644
--- a/src/pxl8_script.c
+++ b/src/pxl8_script.c
@@ -174,6 +174,7 @@ static const char* pxl8_ffi_cdefs =
 "void pxl8_ui_input_text(pxl8_ui* ui, const char* text);\n"
 "bool pxl8_ui_button(pxl8_ui* ui, const char* label);\n"
 "bool pxl8_ui_checkbox(pxl8_ui* ui, const char* label, bool* state);\n"
+"bool pxl8_ui_has_mouse_focus(pxl8_ui* ui);\n"
 "void pxl8_ui_indent(pxl8_ui* ui, int amount);\n"
 "void pxl8_ui_label(pxl8_ui* ui, const char* text);\n"
 "void pxl8_ui_layout_row(pxl8_ui* ui, int item_count, const int* widths, int height);\n"
diff --git a/src/pxl8_ui.c b/src/pxl8_ui.c
index 0813a17..77d35d6 100644
--- a/src/pxl8_ui.c
+++ b/src/pxl8_ui.c
@@ -137,8 +137,8 @@ pxl8_ui* pxl8_ui_create(pxl8_gfx* gfx) {
     ui->mu_ctx.style->colors[9] = (mu_Color){2, 0, 0, 255};
     ui->mu_ctx.style->colors[10] = (mu_Color){3, 0, 0, 255};
     ui->mu_ctx.style->colors[11] = (mu_Color){10, 0, 0, 255};
-    ui->mu_ctx.style->colors[12] = (mu_Color){7, 0, 0, 255};
-    ui->mu_ctx.style->colors[13] = (mu_Color){8, 0, 0, 255};
+    ui->mu_ctx.style->colors[12] = (mu_Color){1, 0, 0, 255};
+    ui->mu_ctx.style->colors[13] = (mu_Color){3, 0, 0, 255};
 
     return ui;
 }
@@ -194,6 +194,11 @@ void pxl8_ui_input_text(pxl8_ui* ui, const char* text) {
     mu_input_text(&ui->mu_ctx, text);
 }
 
+bool pxl8_ui_has_mouse_focus(pxl8_ui* ui) {
+    if (!ui) return false;
+    return ui->mu_ctx.hover_root != NULL;
+}
+
 bool pxl8_ui_button(pxl8_ui* ui, const char* label) {
     if (!ui) return false;
     return mu_button(&ui->mu_ctx, label) & MU_RES_SUBMIT;
diff --git a/src/pxl8_ui.h b/src/pxl8_ui.h
index 51acc52..144c0ac 100644
--- a/src/pxl8_ui.h
+++ b/src/pxl8_ui.h
@@ -52,6 +52,10 @@ void pxl8_ui_destroy(pxl8_ui* ui);
 void pxl8_ui_frame_begin(pxl8_ui* ui);
 void pxl8_ui_frame_end(pxl8_ui* ui);
 
+bool pxl8_ui_button(pxl8_ui* ui, const char* label);
+bool pxl8_ui_checkbox(pxl8_ui* ui, const char* label, bool* state);
+bool pxl8_ui_has_mouse_focus(pxl8_ui* ui);
+void pxl8_ui_indent(pxl8_ui* ui, i32 amount);
 void pxl8_ui_input_keydown(pxl8_ui* ui, i32 key);
 void pxl8_ui_input_keyup(pxl8_ui* ui, i32 key);
 void pxl8_ui_input_mousedown(pxl8_ui* ui, i32 x, i32 y, i32 button);
@@ -59,10 +63,6 @@ void pxl8_ui_input_mousemove(pxl8_ui* ui, i32 x, i32 y);
 void pxl8_ui_input_mouseup(pxl8_ui* ui, i32 x, i32 y, i32 button);
 void pxl8_ui_input_scroll(pxl8_ui* ui, i32 x, i32 y);
 void pxl8_ui_input_text(pxl8_ui* ui, const char* text);
-
-bool pxl8_ui_button(pxl8_ui* ui, const char* label);
-bool pxl8_ui_checkbox(pxl8_ui* ui, const char* label, bool* state);
-void pxl8_ui_indent(pxl8_ui* ui, i32 amount);
 void pxl8_ui_label(pxl8_ui* ui, const char* text);
 void pxl8_ui_layout_row(pxl8_ui* ui, i32 item_count, const i32* widths, i32 height);
 i32 pxl8_ui_menu(pxl8_ui* ui, pxl8_menu_item* items, i32 item_count);