other than that, there doesn't seem to be much of a purpose. eat enough viruses, but there's no clear indicator for how many I have left to eat, or how long until I die. maybe I didn't play long enough?
There should be two bars on the top left. PO2 indicates the oxygen left. AIS indicates the adaptive Immune System. When the AIS is full you win the game. you need about 250 viruses to eat.