fixed level loading and starting to setup proper gyms, zoos and playtest levels

menus/scenes/menus/level_select_menu/level_select_menu.gd

@@ -1,4 +1,5 @@
 extends Control
+class_name LevelSelectMenu
 
 ## Loads a simple ItemList node within a margin container. SceneLister updates
 ## the available scenes in the directory provided. Activating a level will update
@@ -29,5 +30,5 @@ func add_levels_to_container() -> void:
 		level_buttons_container.add_item(button_name)
 
 func _on_level_buttons_container_item_activated(index: int) -> void:
-	GameState.set_current_level(index)
-	level_selected.emit()
+	var level_to_load = scene_lister.files.get(index)
+	SceneLoader.load_scene(level_to_load)