Hello Kakashi00,
Unfortunately, I will be
Rejecting your map.
The theme isn't original, as there are a lot of biome/floating island themed maps. Please refer to the document linked in this thread -
https://manacube.com/threads/parkour-list-with-theme.20194/ to make sure your map idea is original.
The build is accurate to the theme which is good, but the islands are quite small. In the future, try to have one or two bigger main builds that are relevant to your theme, and then build the parkour into those, rather than having jumps floating around the build and void as this will make your map look cleaner.
The parkour has some variety which is good, but a lot of your jumps are grouped. What I mean by this, is you would have a sequence of just ladders, then just normal blocks etc. Try to mix up your jumps a bit more throughout the map as well as experimenting with different ways you can utilize the blocks and items, as this will make your parkour more fun. You also had a few impossible jumps, so make sure that you test your map before submitting!
The difficulty is good for an easy map, and the length is good for a medium.
Thanks for submitting your map! I hope to see more maps from you in the future.