Lots of fun! If it was just a little bit easier to start (maybe make the enemies move a slower?), I would play this over and over. I also agree with what Samwell_II said: hotkeys like A for red, S for blue, D for green instead of a rotating wheel would help with the confusion and speed the player up. But really, I think these are overall just nitpicks. It looks, sounds, and plays great. Nice work!