Crazy Castle is a very fun, and very unique, "puzzle" type game. It's a puzzle in that you have to figure out how to avoid/stun the enemies, while making your way around stairs and doorways, to get all the carrots in each stage. I rented this early in the NES-owning period of my childhood, and while it got pretty tough further in, I enjoyed it. It is not a short game, with at LEAST 50+ stages as far as I can recall. I don't think I beat it back then, but I do remember getting pretty far in. I would highly recommend this game, and the Crazy Castle games on Game Boy get even better!