Blow up the ships and robots and make it to the end of the level to face giant robot bosses. The "A" button makes you shoot to the left, "C" to the right, and "B" uses one of your special weapons (such as a flamerthrower or powerful multi-laser). You can walk along the ground, fly through the air, or even link up with the little vehicle that accompanies you Transformers/Voltron style and speed along like an armored car. This is a really neat game with a very cool control system. Highly recommended.