Game god would play
MAKE A SEQUEL!!!
More options, add descriptions to the leathalness of the stuff (e.g. this dose... will add xLethal points and give you xVisibility points) Make it longer to take over the hole world and make more set backs like "Humans have developed anti-bacterial tablets" (You have to evolve past this), add more leathal options like "infect meat" make a sequel and I hope you read this ^_^.
Once again 11/10 good waste of time, God would play this game, if there are any games like this but on a bigger scale someone tellme ;D