On the other hand, we have options to turn zombie count to zero, or to disable player zombification after being bit. Both of them "breaks the concept of the game". I do understand people who like the challenge. And I don't want to take anything from them. I'm just in my phase in life, that I have really little time to wander across zombie infested cities between work and kids. The optional safety measure to retry a day after dying to a misclick would be really cool for those of us, who just can't afford starting over an over again. I know I can manually backup save. But the file is huge, and it takes time to copy.