Incredibly boring and stupid story. The texts make nonsense. Nuclear explosion just happened, but you are more preoccupied because you hate walking, and the walk is boring. One year that nobody is alive around them, but they have food (huge pizza...food ration is not too important it seems), they have makeup, have their hair very styled and pretty clothes.....STUPID ! Sorry, it's just shit. Nothing else to say. I have stopped playing after 3 minutes.
I mean, to be fair, given how far in the future this is set (if you ignore the fact that it doesn't look particularly futuristic), then all of those issues you mentioned can be accounted for.
e.g.
Nuke - It wasn't a nuke, but some futuristic displacement bomb or human species targeting bomb or a bomb that targets only those that aren't into incest. Maybe it was a non lethal stun weapon that knocked everyone out and then aliens or other humans abducted those they wanted to experiment on with some in artificial habitats or something.
Walking - Lots of people even in this day and age aren't big on walking long distances and maybe transport is even more convenient in this future (teleporters or some other thing). We also don't know how long he walked for/how far he walked and add to that the fact of not seeing another living being the whole time.
Basically everything can be answered with technology.
All food may have a shelf life of decades or even longer. Food might be shrunk down to the size of a marble until it's "cooked" or whatever.
Makeup/hair - it may just take the press of a button. Maybe nanotech.
What's wrong with pretty clothes? They have free access to whatever they want.
I do think it's set too far in the future. A few hundred years in the future would probably be best, as then you can excuse it for not looking completely futuristic, but still containing some futuristic elements if you intend to include them. Then again, all we've seen so far could have been altered memories and at some point some super futuristic world/society will be revealed.