In this shooting game you have to use your enemies weapons against them. You are a space ship under fire, but your shield is holding all projectiles. By clicking the left mouse button, you can fire the projectiles against your enemies and destroy them. Be careful, though, and do not bump into any enemy ships, as this will decrease your health gradually.
Use the mouse to move your space ship and A and D or the left and right arrow key to rotate your shield. Press the space bar to activate your secret weapon.