This map looks nice, and the gameplay isn't half bad imo. You seem to have thought about where you put everything, which is more than can be said for many mappers. And there is a lack of physics objects, which is inevitable since they can be thrown into the void, so I won't hold it against you. But there is no place in this map that runs above 21fps for me, and who cares how beautiful a map is if it's unplayable?
A quick look at the budget and mat_wireframe revealed why:
- You are using way too much dynamic light. Make sure all your point_spotlights have the dynamic light flag turned OFF. This might also fix the shadow rendering budget.
- There is a huge box around your level that is being rendered at all times. This won't work. Experiment with the fog z clipping plane or change the walls and ceiling to skybox.
4 for unplayable but fairly coherent artistic presentation. I think you'll do better with a more conventional level.