This is not your typical shooting defense game because you will have to switch the colors of your laser depending on the stickman enemy that you are firing on to successful cause them harm. In the beginning you will just have to watch to your left and right and shoot the enemies that are bum rushing you and your cannon. As you progress though you will have to keep switching the colors of your cannon for the different attackers as well as watch the sky for rocket-propelled assassins. Also keep and eye out for the bonuses that will fall down in a parachute. You do not have to get everyone so you can pick and choose depending on the power-up that you like.