Hello!
I really like how this progresses

You composition is good and those levels can really become something impressive, however, what is hindering your game is your lighting or better yet: the lack of lighting.
You are also working very fast which is a nice plus
https://forum.game-guru.com/attachment/9516
Nice textures on those walls man!
If you need help with anything in terms of how to use the lightmapper (I know its a bit odd at first) you can always contact me.
Happy developing!
-Wolf
"When I contradict myself, I am telling the truth"
"absurdity has become necessity"