Space Hawk is a derivative of the popular arcade game Galaxian. There is a wave of space hawks at the top, that eventually dive bomb you, that you have to shoot. Unlike the arcade original, the number of aliens increases as you progress. It starts with 5 on the first wave, and then increases by another 5 up until wave 5 (up to a maximum of 25). This game was published in Hot Coco magazine, and is very good quality for a magazine game. The article said it requires Extended BASIC, but I am not sure why it would - it may work without it.
Title: Space Hawk
Author: Rodger Smith
Publisher: Hot Coco magazine, February 1985
Released: February 1985
Requires: Color Computer 1,2,3, 32K RAM, joystick, (possibly) Extended BASIC.