Blaster

Blaster is a 1-player arcade game for the TRS-80 CoCo.

The player controls a small ship at the bottom of the screen that moves laterally and fires vertically forwards. The player tries to destroy sections of a large alien mothership, while avoiding a small attack ship that fires at the player. A small shield moves towards the player, and the shield can be reset by shooting the attack ship or moving through a small gap in the shield. The mothership's total health is shown at the bottom of the screen, and the player starts with 3 lives.