it looks bland maybe add crates, npcs, swords, knifes on the borders, a shop maybe, and never loop alot colors it makes it look just like duplicate things and that makes it look boring.
What i would do:
- First i will make some crates on the edges
- Then i would make the floor have some tiles of stone, (NEVER HAVE JUST 1 COLOR AS FLOOR )
- The stud look from the button is fighting against the smooth look in the walls
- Make like a circular shape on the center and paths (like imagine like an invisible pond in the middle)
- Be inspired by other DBD inspired games to see how they made it.
I think that’s it it looks nice maybe remove shadows if its a stud looking classic game
NEVER USE TOOLBOX STUFF
Edit: You can also be inspired by other peoples drawings/creations in pinterest or smth