I'll admit, the first thing that drew me to this was the title. That pun.
Anyway, the presentation here is off the scale! Great sprite work, juicy movement, nice audio - it's all really good. The movement could have been a little quicker, but that's about the worst of it. Oh, and the ability to pick coins back up when you forget that you don't press space to go through a door.
It's very short, but that's understandable, given the time limit. I'm almost certain you intended to do more with the concept, and there's definitely more to be done with it.