Stop the enemies by clicking to shoot your laser. The top red bar at the top fills up as you shoot - Don't overheat your laser!
Earn points for every virus you shoot. The amount of time left is also shown. Your health is shown in the bottom red bar.
You will encounter junk mail, pop ups, trojans, evil emoticons, and other computer viruses.
After each level, use the points you earn to buy upgrades for your computer/laser, such as extra health, pop-up blockers and stronger lasers.
