Click in the game
area with your mouse or hit the 'S' key to start. Use your mouse
to sight an approaching ship in your cross-hairs. A target box
will light up when an enemy ship is in your sights, giving the
craft's closing speed and range. Click the mouse button to fire.
If your playing screen seems to be too small to see the ships
clearly, try clicking on your browsers refresh button.
Whenever an enemy fighter gets past you, it will fire on your ship. You will see the screen flash and shake if they score a hit. Watch your shields - when they go, so do you.
You can pause the game at any time by hitting the 'P' key. Hit again to resume. Use the 'M' key to toggle sound on and off.