Good job on the first two. (Quick question: Did you draw the 2nd picture? Because it's incredible.) The two on the bottom could be better by adding some dramatic flare to them. (ex. Walking Dead has a greenish tint to their overall color pallet and their graphics have more of a grungy feel instead of a clean look.) Also keep in mind that there's radiation, zombies, people that will hunt you down for mere clothes, and things of the sort that are mixed up in this "post apocalyptic" genre, so if you can translate what I've just said to you, in a graphical format, I guarantee you're going to love your work even more.
Just some advice from a fellow designer :)
:D thanks ill update it soon :)
Edited:
Ew
it's completely out of place with the entire game.
thanks for your advice ill fix it when i get a chance