Very clean-looking game with crisp visuals and clear player-feedback.
I'm guessing this is supposed to go along with music, but you ran out of time or ran into a bug. In that case, I bet would've been super cool!
I don't really have much to say about the gameplay, other than there isn't much chance to swap your mutation during the game. If there was a way to switch between colors easier, it would make the game more interactive.