Extra Terrestrial

Extra Terrestrial is a 1-player arcade game for the TRS-80.

The player controls a small spaceship in the bottom center of the screen that shoots upwards. An alien vessel crosses the screen, and the player must time their shots to hit the vessel. There are 3 rows, and depending what row the alien is on, the player receives 10, 20, or 30 points for a hit. They player gets a total of 25 shots, with the goal to maximize score.