Hey there!
So I mainly focus on scripting meaning when it comes to solo projects, I can struggle doing the building and UI design. My game, “Ban Hammer Fighting” is an entirely solo project, so far I have made two maps for it, and I would like your opinion on it.
I think they look neat. They could definitely use smaller detail however. Like trees and bushes for the first map and rocks/lava coming from the walls in the second.
Keep it up! 
Since this is a fighting game, you could also add some battle-themed structures, like walls, dropped equipment and many more
The first one isnt bad but I would add some decoration and make the stone bridge type thing be multiple seperate pieces of rocks that you need to jump on tho get to the other side and the second one needs a lot more work as its pretty much 4 parts maybe add like some lavapools small rocks or islands and decorate it also dont make the brides just one part instead try to make them a bit more detailed
Overall its good but it lacks some detail
Its a good map for a fighting game since it has a lot of places to move around but it is lacking in details. Here is a picture of another fighting game that captures both a good stage to move around and great details.
hope this helps you make a better map.
i personally think they are a bit barren i would suggest adding some little details like rocks bushes trees etc also some structures so that the players can have a chance at hiding behind like walls houses etc
