A fairly simple, but original vertical space shooter. You control a small space fighter tasked with exterminating hordes of alien spaceships. At first, different slow-moving motherships attack you in four separate waves. When they are hit, they release two smaller but much faster ships. To move on to the next wave of attacks, the player must shoot down both the mothership and the two shuttle pods while avoiding being hit by either of them.
In subsequent stages two motherships will appear on the screen at the same time and their movement speed will gradually increase. The game repeats endlessly until the player runs out of lives.
