Using WASD or Mouse, to move your refill. Press Mouse buttons or space, to fire. Points plused by on the object amount of points, if you touching needed color and fire. And also, an enemy named Belledy will interfere with you, asking you not to shoot at the target, but you can fire at her, and then she will get scared and run. You also can play normal mode and shoot the Belledy mode multiplayer.
Based by idea from BrickCuddles(me).