One of the best implementations of the theme I saw, at least one of the most fun! The art and sound's a little rough on the edges, but with more time I'm shure it will be even better.
The closing gates at the start of the level are cool artistic touch, but they glitched on me couple of times ( sometimes they didn't open fully, only one part slided, the second time they didn't open at all!).
But overall nice little game.