Shoot the incoming enemy space ships by firing rockets from your space ship. If you shoot down all the 20 enemy space ships you win the game.
Press W, A, S, D keys, or arrow keys to move your space ship. Press the mouse to shoot. If the missiles from the enemy space ships hit your space ship your strength gets reduced by one percent. If your strength becomes zero you lose the game. The aim of this game is to win the game in minimum possible time.