Needs sounds for when you shoot, get damaged, and absorb colors. Would give you a sort of "confirmation" about your actions even if you aren't looking directly at your pod.
Nice crisp visuals. If you added some solid sound effects this game would be really catchy. Also it would be nice to use the mouse instead of arrows in a "twitch" game.
If you accidentally click the main menu button more than once, then you get multiple instances of the background music. Oww my ears! :P Fair effort, could use some polish.