diff -r a35b39abe2b2 -r d619bf7dd87b test/snake/snake.c
--- a/test/snake/snake.c	Sat May 03 14:37:57 2025 +0200
+++ b/test/snake/snake.c	Sat May 03 19:48:57 2025 +0200
@@ -53,7 +53,8 @@
     cxMempoolRegister(asc_active_glctx_mpool, tex2d, destroy_textures);
 }
 
-static void update_fps_counter(AscSceneNode *node) {
+static void update_fps_counter(AscBehavior *behavior) {
+    AscSceneNode *node = behavior->node;
     static uint64_t last_fps = 0;
     static uint64_t debounce = ASC_NANOS_SECOND - 1;
     debounce += asc_context.frame_nanos;
@@ -81,9 +82,10 @@
     }
 }
 
-static void scale_backdrop(AscSceneNode *node) {
+static void scale_backdrop(AscBehavior *behavior) {
     // scale the backdrop to the size of the window
     if (asc_active_window->resized) {
+        AscSceneNode *node = behavior->node;
         asc_vec2u window_size = asc_active_window->dimensions;
         // TODO: replace scale with asc_sprite_set_size()
         asc_set_scale(node, (float)window_size.width, (float)window_size.height, 1);
@@ -93,7 +95,7 @@
 
 static void create_backdrop(void) {
     AscSceneNode *node = asc_sprite(.texture = TEXTURE_BACKDROP);
-    asc_scene_add_behavior(node, scale_backdrop);
+    asc_behavior_add(node, .func = scale_backdrop);
     asc_scene_add_node(BACKDROP_SCENE, node);
 }
 
@@ -101,7 +103,7 @@
     asc_font(ASC_FONT_REGULAR, 12);
     asc_ink_rgba(224, 224, 224, 196);
     AscSceneNode *node = asc_text();
-    asc_scene_add_behavior(node, update_fps_counter);
+    asc_behavior_add(node, .func = update_fps_counter);
     asc_add_ui_node(node);
 }