Space Ace is a 4K machine language space shoot 'em up game that was published in the June issue of the tape magazine Chromasette. Fitting in 4K, it's a very simple game with keyboard controls - left/right arrows to move left and right, and the up arrow to fire. The player gets a single shot on the screen at a time, which is a single pixel. The aliens travel in diagonal directions, starting out slowly but speeding up as you destroy them. They also fire (one shot on the screen at time) at the player occasionally but their shot is a full laser line and is the only way the player can die; the aliens can move close to the player on the bottom, but will never actually hit them. The game has decent sound effects, and a little animation of bring up the player's next ship from the lower left corner when the player has died.
One of the few 3rd party ML arcade games for the Coco with only 4K of RAM. I should mention that someone patched it for disk, but the intro screen is missing on that version (the game itself plays fine).
Title: Space Ace
Author: Andrew Pakerski
Publisher: Chromasette June 1982
Released: June 1982
Requires: Color Computer 1,2,3, 4K RAM.