Ok, several things:
- In order for the downloading to work properly, you need to use the .md2 extension in your model entity (instead of skm). I hex edited the map and put it up as oth_b7_alt
- You also need to add a key called "requiredfiles" to your worldspawn entity and "scripts/cmp.txt" for the value, otherwise the tree won't have the transparent parts.
- You need to use a nodraw brush instead of a clip brush so you can't shoot through the tree. Try nodraw + translucent or trans66 so it doesn't leave a hole in the ground.
- I guess there needs to be a second helper box to the high flag (that or angle the ledge down or something). It was really just a suggestion to help the newer players, and if they can't jump the gap, they probably can't double jump, either.
- Add some volume to the walls. They look paper thin. I'd go at least 64 units thick. Also, maybe don't angle them down as much on the variations. Just try to make them look natural.