hihi this map is a great concept /idea!
Unfortunately, the build does lack detail and texture. Try having the build on one main island so it looks less messy and more together.
The difficulties of your jumps are quite inconsistent- they jump around the easy/medium/hard difficulties throughout the map. Try to make your parkour difficulty consistent throughout. Although there is some variance, your map does need more of it. You can use things such as iron bars, fences, cacti , heads, etc. Try not to clump these variations together either as it can make the parkour repetitive.
I hope this helps c;
Have a good day/night.