Use your mouse to corral up the good viruses.
Antidote : Collect all the healthy viruses to stay alive! Dont touch the deathly ones!
Viruses like to grow so make sure you get them before they disappear. Collect groups to increase your points and collect faster. Make sure you keep your cure bar from being depleted; otherwise the game ends. Bad viruses (black) will lower your cure bar so make sure you avoid them!