Post-Apocalyptic Watchtower

I've recently decided to make my own city, but I wanted to make it different. I ended up choosing a sort of post-apocalyptic sort of design, like dark and dirty looking. I want to make a fortified wall around it with these watchtowers on every corner. I just wanted to show people my first creation with this style so I'd know if people like it enough for me to continue.
I'm going to have multiple districts of my city with multiple house and building designs. And the tower is purposely straight up because there's going to be a wall on both sides, so if you have OCD about things like that (I understand, I'm the same way), sorry! It'll look better when the wall's attached.
Well, tell me what you think of my watchtower and my city idea! Any help would be really appreciated, because I'm always willing to accept comments, critique, and criticism. Diamond if you like it, favorite if you love it, and subscribe for more updates on this build!

-Scott

P.S. Don't mind the gravel mountains or whatever they are, I just didn't want it to be really plain.