Hi!!! Based map!!! I'll upload some things I found here!
A lot of props in the 3D skybox had collision meshes enabled.
A lot of the trees out of bounds also still have collisions enabled.
There are various props around the map, either in the play area or beyond (where the player can't reach) that have collisions too, where they may not realy need them!.
This railing can be stood on which may not be intentional. Same with the pipes.
Through this area there are giant mountain cliffs that are protruding into the room in several areas
A determined enough player could get up to the top of this tree (on the left) as it does not have clipping or a push trigger
The lantern moved but the nail did not.
There are several areas where players might perch up high.
I think that's all I found! Sorry if some of the things I pointed out are nitpicky! The map is excellent. Keep up the great work!!!