Infectonator! Of course, this is a ten.
Wow. Shitty graphics - BEST GAME ON NG. I swear, this is the best flash game ever. I actually am playing this AGAIN. For the TWENTIETH TIME or so. Geez. This is excellent.
To make the game more fun, here's a strategy. Begin by upgrading SPEED. Then go on to INFECTION CHANCE. Finish with your DAMAGE REDUCTION. :)
Thanks for this game.