Amagon encounters a variety of enemies which he can dispose of with his rifle. He also has the ability (upon collecting and then activating the Mega-Key) to transform into a larger, stronger version of himself called "Megagon". Upon transformation, Megagon is given 1 hit point for every 5,000 points he scored as Amagon (whereas a single hit from any enemy or hazard will kill Amagon). Megagon cannot use the machine gun, but instead has a punch which does eight times the damage and never runs out of ammo. At the cost of one hit point each, he can also fire waves of energy from his chest; these are much broader than machine gun shots, do 16 times the damage, and can hit multiple enemies in a single blast.