Hey,
Sorry to tell you that your map has been rejected.
The theme is not very original, we already have plenty of island/biomes looking maps (Biomes, BiomesPK, JungleHut...), please try picking ab etter theme next time, I suggest you checking the parkour list and find a theme that as not been used too much.
Build also needs improvement it's very simple and not super interesting, you used basis minecraft jungle trees and it would have been much more interesting if you made them yourself. I would also suggest you staying with one main build and avoid multiple structures so it doesn't become too messy.
Parkour is not too bad, it's quite simple but it fit the difficulty and it has some interesting jump like the piston at the start and you did try varying the jumps (don't be scared using different jumps through the map and not just on specific spots (the soul sand, the fences for example)). I would still suggest you making your parkour on the build and avoid floating jumps, for example the parkour at the very start hide the build. The very end with the vines could also be better, it's not super fun to do.
Thanks for submitting your map.