The 3d skybox isn't aligned correctly, nor is the scaling correct.
This tree is YUGE
Align these textures (look for more misalignment in the map, too)
I dislike this jump. The pogo kinda making you strafe away from the wall.
Remove collision from all torches/props in the map.
I dislike this part where you sync -> pogo since you can overshoot the sync. I don't like these kinds of jumps anyway, where you go up a wall and there's a pogo right on top. (Also an example of your map being too dim)
I really dislike this jump. You can hit your head on the wallshots going up. I wallbug on the invisible player clip sometimes for the wallshots up. The sync is straight up, then you need to do a distance wallshot right after on a floating wall. The jurf textures are too bright.
You can pogo on the edges of where the castle breaks to cheat it kinda.
Add a bar or something to tell the player when he's about to go past the wall here maybe.