Sometimes people that make games just get it right, and the people who made Nanotube got it right. Nanotube is a game where you try to match the colors of the balls that are shooting out from the center with the colors in the ring around the center. It isn't that complex of a game, and I have seen this kind of game before, but Nanotube does it just right. It is a really fun, simple game. Check it.
My high score so far is 29618, which gets me the rating of "shaven monkey"