Nice.
This is a good game, but by itself it doesn't seem enough, this is more of a minigame type thing, and would be much more interesting in the middle of a bunch of other games. However you've managed to get the game to stand out even though it is very simple. This was fun for a little while, adding some twist to the game or even just changing color between levels would dramatically increase the overall fun-ness. I liked it though! :D