SCRATCH INVADERS Save the Earth from destruction by ugly alien creeps. Avoid the bombs and shoot the aliens as they creep closer and closer. Everything gets faster as you clear each level. New version includes power-ups for canon and speed. Grab the 'L' and 'S' with your ship when they appear. Use the arrow keys to move left and right. Fire your shots with the 'up' arrow key. Pause with 'p' to get a break.
