I like the idea, but it seems a bit buggy. On the second level there was one coin stuck in a space you couldn't reach. I thought at first I'd be able to jump in under the space from the top of the level, like a portal (like the first level), but that didn't seem to work. Otherwise it's a great idea, with simple graphics and good sound/sound effects. The notion that each level is completely random, which I assume it is because of that bug, is also intriguing, knowing each time you play it'll be a bit different. Nice work!
-cd-