Shuffle levels when restarting a game

Game.gd

@@ -55,6 +55,7 @@ func create_game():
 
 		if (levelIndex >= levelScenes.size()):
 			levelIndex = 0
+			levelScenes.shuffle()
 
 		if !levelScenes[levelIndex]:
 			levelScenes[levelIndex] = load_level(levelNames[levelIndex])