Alien Invasion

Alien Invasion is a space-themed arcade game for the Apple II.

The player controls a small turret that fires vertically from the bottom of the screen, and can move horizontally. An alien saucer buzzes about the screen, and fires down upon the player. The player starts with a time of 999, and they receive points when they hit the enemy saucer, but lose time when struck by an attack. The goal is to maximize score.