I don't feel like I have to comment on the build, because you clearly nailed it. I have played through your parkour though, and there are things I would really like you to change. Mostly, I'd like you to nerf the slime and vine jumps at the beginning. I can't reach the slime at the beginning consistently, and I can barely get the vine after. The second vine is just as hard to reach, and combining these with a hard jump right after makes the beginning area feel too hard for an expert. I would also enjoy the map more if you removed the luck vines, mainly the one inside the body, and adding a somewhat challenging jump to make up for its removal.
Other than these, the parkour is well built, fun and challenging, although the ending area in the head could definitely do with more jumps and a general buff to the area. It would also be nice to have lighting in the darker areas.
I also got stuck here:
View attachment 34841
I didn't realize I had to go up into the head, some carpets would clear up the confusion.