Follow these steps to play the game
WASD = Move
Left-Click = Shoot a Freeze/Shrink Enzyme
Space = Drop Freeze Bomb
Shift = Drop Time Bomb
You are a white blood cell. Your must protect the red blood cells. One way to do this is to bump them out of harm's way. The other way is to destroy the zombie viruses by moving over them. To help you do this, you can slow down the viruses or shrink them by shooting enzymes at them or by using Freeze or Time Bombs. Also, pick up as much RNA (green spots) as you can.
First it was the bird flu. Then it was the swine flu. Guess what's next? That's right: the zombie flu!