I like how the power ups are part of the scenery. One thing that I think you should add is a 'kids mode'. With only left & right, and no real game over. I'm trying to teach my kids left & right, and one is a lefty and the other is a righty. I think a few days of this on kids mode will help that out. EDIT: cool, now there's a kid mode! Here's another star, and thank you!
Easy to learn but hard to master. Great game.