The game is idea is quite fun and unexpected. I believe you can lower the click rate for the hand to grab the knife easier, it is a bit frustrating at first. The mechanics play nice, I like the head of the players rotating when you point the mouse to a different direction.
I am also working in unity and I am curious how did you make the knife paint the table in this way?
Anyway I think it is a solid game given the fact that it was created in 72 hours and it is actually fun.