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doesn't help maybe you need to upgrade your browser!
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 left mouse button to fire.
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
For best effect, you may want to maximize your browser window before loading the game. The page uses a script to set the applet's width and height to fit the available window area.