The main weapon should be on auto-fire and you click to fire the mortar. Constantly pressing space or ctrl while trying to strafe feels really awkward, and you have no reason not to be firing your main weapon.
Good game, but the continue system is too unforgiving. When you continue it starts you out will all your colors empty, and if you are far along enough in the game you will die again before you can get your powers back. If you die late in the game there is no point in continuing.
Love the music and concept, but the execution is horrible. The first level is much to hard and mostly luck based. The camera is terrible in the first level. It needs to be static like in a Mario game. Level two is too easy and boring. The hit detection for the spikes on level three is atrocious.