I really like the theme, and the build is very well done and detailed.
Looking at the parkour, there is a nice variety in jumps, and they fit the difficulty well. However, when trying the parkour, there isn't a very clear path in where you actually need to go, it isn't a huge issue, but I would recommend maybe adding a certain colour carpet, or something else like that along the path of the parkour so it is easier to see exactly where to go.
Good luck! :)