Got the bug for that fixed! However, since this game is for a jam and said jam's bug fixing period has ended, I cannot do an update for this game at the moment!
This bug sadly happened because of a fix I put in. Basically, you should have won with the infected townspeople hitting 1000/1000. Since it'll be a good bit until I can fix this bug, I can give you a quick hack that should allow you to see the ending you worked for, if you want!