Updated game to use new scene stack.

src/game.odin

@@ -10,8 +10,7 @@ WINDOW_TITLE :: "Pong"
 
 Game :: struct {
     viewport:      rl.RenderTexture2D,
-    scene:         Scene,
-    overlay_scene: Maybe(Scene),
+    scene_stack:   [dynamic]Scene,
     should_close:  bool,
     audio:         Audio_Manager,
 }
@@ -29,22 +28,19 @@ game_init :: proc(game: ^Game) {
     // allocate some event capacity to stop early dynamic reallocations 
     GLOBAL_EVENTS = make([dynamic]Event, 0, 16)
 
+    game.scene_stack = make([dynamic]Scene, 0, 8)
     game.viewport = rl.LoadRenderTexture(VIEWPORT_W, VIEWPORT_H)
-    game.scene = make_main_menu()
-    game.overlay_scene = nil
     game.should_close = false
+    set_root_scene(game, make_main_menu()) 
 }
 
 game_update :: proc(game: ^Game) {
     dt := rl.GetFrameTime()
     input := poll_input()
 
-    // Pass direct pointers (^Scene) so modifications persist
-    // only update the overlay, if it currently exists
-    if overlay, ok := &game.overlay_scene.?; ok {
-        scene_update(overlay, game, input, dt)
-    } else {
-        scene_update(&game.scene, game, input, dt)
+    active_scene := get_active_scene(game)
+    if active_scene != nil {
+        scene_update(active_scene, game, input, dt)
     }
 
     // background music buffer streaming
@@ -61,12 +57,10 @@ game_render :: proc(game: ^Game) {
     rl.BeginTextureMode(game.viewport)
         rl.ClearBackground(rl.BLACK)
         
-        // Render base scene
-        scene_render(&game.scene)
-
-        // Render active overlay on top if present
-        if overlay, ok := &game.overlay_scene.?; ok {
-            scene_render(overlay)
+        // @note: fine for now but probably not a good idea...
+        // Render all scenes in the stack from bottom to top
+        for i in 0 ..< len(game.scene_stack) {
+            scene_render(&game.scene_stack[i])
         }
     rl.EndTextureMode()
 
@@ -83,6 +77,10 @@ game_quit :: proc(game: ^Game) {
     // cleanup global managers
     audio_manager_quit(&game.audio)
 
+    rl.UnloadRenderTexture(game.viewport)
+    delete(GLOBAL_EVENTS)
+    delete(game.scene_stack)
+
     rl.CloseWindow()
 }