I've spent the last 4 hours playing this game and I absolutely love it. Though, feel like this game would be a bit better if you could experiment on at least 2 zombies at once. I kind of feel bad for the little guys... Having to constantly go from elated to pissed and back again. I feel especially bad when I have to kill them just because their jaw fell off and I can't make them do anything that involves their mouth lol