Really cool idea here - those animations are choice!
Some tightening up of the controls, and maybe have the colors control more than just what enemies you can hit (maybe link to movement options?) would be cool. Also, it was annoying sometimes trying to shoot enemies that were slightly above me as they would fly horizontally making me have to jump and shoot repeatedly, that may have been intended but it didn't feel great when it happened.
Would love to see this expanded on :D