I'm getting a glitch when I fire the hamster gun and the Abe Lincoln Hamster comes out. It seems to make me stuck to that particular screen and i can no longer move to another room. I have to save and exit to make the game work again.
I'd appreciate a rewind button, so if I do something stupid and die when I was about two seconds from beating the level, I wouldn't have to play the whole thing over again. (Oh and tip: Level 16 A rank is possible as a single player.)