A very interesting concept.
As a zombie fan, I found the game to be very appealing. I really loved the idea of trying to humanize zombies instead of just killing them, while still offering nice torture options. The reactions at the same time, were very interesting and mixed some nice dark humor that made me laugh at times, and seeing how the behavior can turn out from shocking to heart warming was great.
-However, the animation needs improvement, and I found the ending to be kind of distasteful... I was really getting into the story, and the fact the game just ends there is fairly disappointing after the hours I've spent playing it. There should be a proper ending to the game in my opinion, probably based on your studies and the stats of your current zombie, with a New Game + so you can mess around with what you've unlocked.
-Also, many including me would appreciate if you could be able to skip the animations you've already seen before, they get really repetitive after a while and makes the game more time consuming.
-Other than that, I really enjoyed the game and spent plenty of hours to fully complete it, and I must say it was worth it.