Awesome game. Used to play it a couple of years ago. One thing that really bothers me is that it is so repetitive and gets boring when you're at floor 2 - 3, because the levels are pretty much the same. I'm also dissapointed that the red coins don't unlock anything special, it's just a waste of time getting them. The mechanics were alright.
Anyways, good job! I can't wait to check our more of your games :^)