Multiplayer game. Only one key per player is enough to control your ship and, nevertheless, it's a great fun. Your ship is constantly rotating and only thing you can do is to fire a projectile - to kill your enemies as well as change your movement due to backfire. You get damaged by collision with walls, enemies and projectiles, so watch out! Original game idea goes to Vlaada Chvatil, Ais are my idea (every ship has unique AI, try to fight against each of them).