Click within the applet
Use the left and right cursor keys to move.
Press 'Space' to fire.
Shoot all the aliens to clear the level.
Shoot the mothership for a bonus.
See if you can score enough to get into our Invaders All-Time Top-Ten High Score table!
Press P to pause/unpause the game.
Press S to turn the sound effects on or off
Press M to turn the music on or off