It is a planet-destroying game. There are some moving planets. The player has a spaceship, and he can fire bullets from that spaceship. The player can also move the spaceship.
After destroying all the planets, the score shows how many bullets the player totally used.
If the game is played among friends, then the less the number of bullets is used, the higher position that player will be in.
The player can press "spacebar" to fire the bullets, and press "q" to quit the game. The "Right" and "Left" arrows are used to move the spaceship.