This is one of my favorite games of the Jam! Got a high score of 223. Since the spawn rate for people doesn't seem to change based on number of houses or amount of food, it seems like the winning strategy would just be to make a ton of houses and fields at the start, get as many people as possible, sacrificing the bare minimum while the blood depletion rate is low, then just factory farming people into churches and libraries and then into the pit to die once things speed up.
Alas, this game is not too realistic, or else every librarian would be chucking Molotov cocktails at the White House daily.