Congrats on finishing a game! I'm really only gonna focus on the things I didn't really enjoy, because those are the ones I can critique, but overall I enjoyed playing it!
I feel like the movement was a bit rough (sometimes my character would appear to be stuck on nothing) and the random movement of the NPCs felt unfair (sometimes, an infected person would turn around without warning and infect me).
Despite all that, I think this idea has great potential, and I'd love to see a more polished version of it!