Visually, I like it a lot! Those 3D skyboxish structures look super cool and I love the yellow base. Maybe you can give the red textures a bit of glow to look similarly.
Wpoly is very high in some places, sometimes unnecessarily. Maybe someone with hint brush skills can give you more constructive advice. Since the lighting is very uniform in many places, you can reduce geometry without anyone really noticing (e.g. the part with the window-like structure). Also, while the bases and the mid area looks very cool, the darker areas like that lower part seem very grey / homogenous.
For parts like the stairs, maybe consider adding a clip brush to make it a ramp, otherwise unpredictable jumps might happen with double jump script.
Also, mechanically less skilled players might find this a very linear experience, as changing pathes most often requires speed jumps or double jumps (at least from my perspective). So depending on your desired target group, maybe add some ladders, ramps with less slope or something similar.
Also, @jitspoe, I got those lines in the console when loading the map (locally). I don't have that clip texture, yet in the past I never saw this when missing a texture.
