Good atmosphere. Immediately I entered the map and it looked natural. After 10 seconds it fell apart, however. You tried to push in the wall to fit the brick textures, thereby making it look less flat. But you did this in a pattern and so it looks less natural, like you tried to make it look natural but it's synthetic regardless.
The lava's well done. The particles work.
I can tell the gameplay is all about the teleporters. They all seem to link and connect to important parts so knowing where they go will determine the victor. This is new, as I don't see other maps doing this. It's refreshing.
You need to put noclip on the parts sticking out of the wall. They're small outlinings to something running up the wall. I don't know how to describe it. Running along the wall on the bottom level, you will get stuck on it.
Also, noclip the trim on the floor. It's annoying that you rise up and fall down slightly and suddenly as you run. You've obviously nclipped and clipped everything else, so maybe you left these undone on purpose.. I don't see why though.
Maybe you can consider making a taller platform to rifle jump onto the top level?
Consider putting a health boost over the lava. It's well worth the risk of falling in.
Good though! 4/5, change what I said and 5/5.