Astroblast

In Astroblast, the player controls a laser cannon at the bottom of the screen; the goal is to earn as many points as possible by destroying the various incoming meteors, bombs, and other objects. Points are earned for destroying objects, while points are lost for letting them get past the player. Meteors are the most common item needed to defend against. They come in various sizes and colors, and some even split into two smaller meteors when shot.