Hello oyja,
Unfortunately, I will be
Rejecting your map.
The theme isn't original, as there are many floating islands/biome themed maps. 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.
The build is nice, it's simple, yet has some good details.
The parkour is quite repetitive, as most of it is normal blocks and ladders. Try to experiment with a larger variety of blocks and items when building parkour, as this will make your map overall more enjoyable to complete.
The length is good for a medium/hard map, and the difficulty is good for an easy map.
Thanks for submitting your map! I hope to see more maps from you in the future.