refactored the way levels are listed in the toolbox

addons/maaacks_game_template/extras/scripts/scene_lister.gd

@@ -3,6 +3,8 @@ extends Node
 class_name SceneLister
 ## Helper class for listing all the scenes in a directory.
 
+@export_tool_button("Refresh files", "Callable") var refresh_files = _refresh_files
+
 ## List of paths to scene files.
 ## Prefilled in the editor by selecting a directory.
 @export var files : Array[String]
@@ -14,10 +16,20 @@ class_name SceneLister
 
 func _refresh_files():
 	if not is_inside_tree() or directory.is_empty(): return
-	var dir_access = DirAccess.open(directory)
+	files.clear()
+	find_files_in_dir(directory)
+			
+func find_files_in_dir(current_dir: String) -> void:
+	if not is_inside_tree() or directory.is_empty(): 
+		return
+	var dir_access = DirAccess.open(current_dir)
 	if dir_access:
-		files.clear()
 		for file in dir_access.get_files():
+			print(current_dir + "/" + file)
 			if not file.ends_with(".tscn"):
 				continue
-			files.append(directory + "/" + file)
+			files.append(current_dir + "/" + file)
+		for sub_directory in dir_access.get_directories():
+			if sub_directory.begins_with("_"):
+				continue
+			find_files_in_dir(directory + "/" + sub_directory)