The aim of the game is to shoot down X-wing fighters by aligning them in your sights, using either keyboard or joysticks. Sufficient X-wings must be shot down to prevent your own craft running out of fuel.
It's confusing to play at first, since the controls actually move the enemy fighter, not your craft. The stars stay fixed.
In-program instructions were adequate, and the game seemed robust and well tested.
Inevitably, though, a game written in TI Basic is going to be very slow and rather boring to play.