Too slow moving
I like that it focuses on the scientific method, and can be a flash-point to get folks discussing the ethical boundaries of scientific research.
But as a game...it's sort of boring. It's just too slow paced. I found myself constantly waiting around for the research to finish, and short on RP, so I'd have to dawdle around with actions I've already done, over and over, just to scrape together more RP. Then it was a toss up ... do I research techniques which can make the research go faster or cost less, or do I research items to get more RP/reactions, or .. well, then I realized you can do ADVANCED research on items, and ... I felt like I was playing the zombie equivalent of "Upgrade Complete 2". It just seemed like so much stuff to spend research points on, but there wasn't enough interest in the game for me to want to get them.
I like your games, the art was great, the music, voice-acting, etc all came together great. But, I just think you could have picked up the pace on this. It is not entertaining waiting around for 30 seconds for some research to complete while throwing a baseball at a zombie. Maybe some folks are entertained by that, but folks that are really fascinated by the scientific method of the game would get bored by the repetition.
The ethics of abusing a zombie is also ... well, that's a topic in and of itself. Regardless of how amusing or abusing it is, it sheds light on subject testing. Where do we draw the line?
Every time I saw the meter read "Humanity lost 0.1%", I kept thinking it was my researchers humanity. Because some of the stuff he was doing was pretty unethical, even to a zombie. But, if humanity's fate rests on it, I guess we have a flexible moral constitution.