Main goal of the asteroids game is to destroy asteroids and saucers. The player is in command of a triangular spacecraft that may rotate left and right, shoot straight forward, and thrust forward. Once the ship starts traveling in one way, it will continue in that route indefinitely unless the player adds thrust in a different direction. When not thrusting, the ship finally comes to a halt.is to destroy asteroids and saucers. The player is in command of a triangular spacecraft that may rotate left and right, shoot straight forward, and shove forward. Once the ship starts traveling in one way, it will continue in that route indefinitely unless the player adds thrust in a different direction. When not thrusting, the ship finally comes to a halt.