nice map.
I think the collider in the left should be more visible (brighter maybe).
The polys sometimes go upward the ropes, and seems like you are stepping in the air. I think the ropes should be a little above the polys.
The vertical ropes that "are" OPC could be fatter, because the bridges are intuitive, but those walls aren't (yes, I see the crisscross you made, but I don't think it's enough)