after pressing start, you have to first click onto the screen to activate your crosshair, then if you scroll up with your mouse wheel, you go forwards, if you scroll down with your mouse wheel, you go backwards, you hold down middle click to shoot a BIG laser, you short middle click, you get a small laser, you have 4 lives, after you've completed a wave, a spinner wheel pops up, you have to click or press space to spin it, and you will be given a buff and a new wave starts. Complete as many waves as you can