Great concept, poorly executed
The game could be a lot of fun, but (at least on my computer) it got to running really slow. You need to take a look at your actionscript and see if there's anything you can do to make it faster.
For the number of sprites and the level of graphics you have, it's just way to slow.
Look for all the loops you have running that contain the hitTest() function. That's probably what's making it run slow.
That, really, is the only thing wrong with the game. It's more than enough, though.