Test with godmode file:
Zombies don't agro (which i assume is intentional) although sitting in one place to long, makes the zombie "eating you" sound spam itself, and insane lag is generated. I don't know what this is from, I will do some more tests on another file, (no god, hp, food, water, etc. and simply the no god file) but I hope you find a fix soon, because you cant do anything with the lag. It is not manageable.
Other than that, so far it seems to be a great hack, infinite food, water, rads, etc. is working fine. And everything is doing as it should.
Best of luck, Internal.