Space Quarks

Space Quarks is a fixed-screen shooter for the home computer. The game is
very similar to arcade classics like Space Invaders, Galaxian and Galaga.

The player controls a tank, which can move left and right across the bottom of
the screen. Fire missiles at the alien invaders flying overhead in a variety
of formations and patterns. But watch out… after you start shooting and
hitting targets, you can bet those aliens will start firing back!

Clearing levels leads to more lives (“tanks”), more points added onto your
score, and, of course, even more levels of aliens to clear.