Use your mouse to move and aim the anti body. Avoid hitting the viruses or your game ends. Click to attack and kill currently killable viruses. Killable viruses are indicated at the top. If you pickup pills, you would be able to fry all the viruses you touch for a limited time. Meet the level target to level up. You can upgrade at the level up page which enables you to fry selected enemies by touch. Have some awesome fun playing Anti Body!