Pretty cool concept, it kind of feels like a small part of a bigger game, i.e. what's in this game felt like a mechanic in a shoot-em-up, where you need to maximize one color sometimes to kill certain enemies more easily, then max out the other to kill other enemies more easily? The movement and shooting felt good, but wish there were enemies or more interesting obstacles of some sort. Visuals are good, though could have added a scrolling (or even static) background to add some depth and set the mood. All in all though, nice little project, congrats!