I Can't really say much because I finished it so um from your version you should try to have your concepts get more intricate and detailed as you go on..you started with a ruined city and zombies..Perfect match but what I did is make it darker to give it that bit more detail.Also don't forget the basics, you shouldn't ever place your render in the center.
Also in your version you had it monotone and a bad one at that, try to keep some different colours in your work unless your going for a monotone look.
My text wasn't great tbh now that I look at it while I'm properly awake it could have some more work done to it.
Great job anyways you are coming on a lot..I remember when I was helping you make a Nike 0.6 Logo look better and have your name on it :love: