Maybe I don't understand the rules, but the game never seems to end in a way that makes sense. I'll put a virus down and not infect anyone, and it pushes me to the next lvl. Other times I start the infection, then immediately the game stops. I don't seem to need to reach the quota to continue, yet eventually the time it gives me is 2 seconds per lvl, which is impossible to do. Also the achievement windows just get in the way, and you waste a grenade clicking the close button. I feel like this game could be a lot of fun, if it was given time to be finished.