Nice game! I found the concept very interesting, blocking Bert from the end until they get the cupcakes, but you always need a path to the end so you make these long snaking corridors. Making sure the maze always needs a valid solution was a nice solution to the player just blocking off the exit! I found that on level 6, the entire grid would be black and once you reached the end, since there were no cupcakes, it'd say game over. Not sure if the bug is just on my computer since other comments say it worked on level 6... But yeah, I really enjoyed this game's puzzles!