Polarity

Polarity is a Top-Down Shoot 'm Up with enemies of two polarity types: red and blue. You control a ship that can switch between these two polarities for both offensive and defensive advantages.
Fire at enemies of the opposite color for an offensive advantage since opposite color enemies will take more damage from each shot. When fired upon, match the polarity (same color) of the incoming shots to have your shield absorb them and leave you unharmed.
Play Polarity (it takes a while too load)