Lazer-Blaster

Description
Lazer-Blaster is a 1-player arcade game for the Apple II.
The player controls a small space station which sits in the center of the screen that can fire in the 4 cardinal directions. Enemy vessels approach from all four sides, and the player must quickly shoot them before they reach their base. If an enemy vessel reaches the base, it is destroyed. The player has a total of 3 bases, and if all are destroyed, it's game over.