Click within the applet Shoot the waves of aliens and avoid their fire! Watch out -- menacing aliens enter the game from all sides, and can swoop down to get you at any minute!
Use the Left and Right cursor keys to move the ship. Press the space bar to shoot. Collect the double-laser pickup, and the sheild pick-up. Press S to turn the sound effects on or off, press M to turn the music on or off
If you shoot well enough, you might just make it into the Galaga Top Ten High Score Table, reserved for only the most skillful pilots!
Good luck - and be careful out there...