Trapped in an ancient alien space pilot training facility you must use your skills to maneuver your spacecraft out of each area without getting destroyed. The faster you are the better.
Thr-ust-eroid is a one button game, you have a ship, which keeps falling unless you give it a Thrust(spacebar). The object of the game is to avoid oncoming asteroids, watch your fuel level and catch fuel barrels and travel the maximum possible distance.