great game
i really loved it althoug a endless game would be nice, even if you couldn't end it, maybe together with some sort of achievements. I also really think that this game has got alot of potential to become a great Iphone game, maybe you should try to make an Iphone version of it (althoug i wouldn't know how to do that) or contact someone for that.
the only downside of the game is that it gets boring after a while, but I don't think that that's a big surprise ;)