It's impressive how small you got the file size, but the game itself is far too flashy for my tastes. There are some times when the colors really get in the way of telling which way you are going. I also seem to be getting lag sometimes, especially while writing this (continuously colliding). It could really use a pause button too. One other thing is that with how the game is setup, using a back-and-forth pattern is basically guaranteed to give a high score.