Hello MessiB & matzes,
Unfortunately, I will be
Rejecting your map.
The theme isn't original, as there are many biome related maps already. Please refer to the document in this thread -
https://manacube.com/threads/parkour-list-with-theme.20194/ to make sure your map idea is original. (CTRL + F on windows and command + F on mac to search for themes in the document)
The build isn't bad, it's accurate to the theme.
The parkour is very repetitive, as most of it is normal block jumps. Try to experiment with a larger variety of blocks and items, as well as the way you utilise these, to create more original and enjoyable jumps.
The difficulty is good for an easy/medium map, and the length is good for a hard/expert map.
Thanks for submitting your map! I hope to see more maps from you in the future.