Hello ShAmPo0o,
Unfortunately, I will be
Rejecting your map.
The theme isn't very original, as there are many biome/nether themed maps, none exactly like this, but the theme is still common. I would suggest referring 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 isn't great, as it does feel a bit blocky, I would recommend trying to add a bit more shape and definition to the build where possible.
The parkour is very repetitive, as it is mainly normal blocks and ladders. Try to experiment with a larger variety of blocks and items when building jumps, this will make your map overall more enjoyable to complete.
Quite a bit of the parkour is floating, try to implement the parkour more into the build, rather than having jumps floating over the void, as this can make your map look a bit messy.
The difficulty is good for an easy map, with maybe a few medium level jumps, but the length is too long. Please read over this thread -
https://manacube.com/threads/must-read-map-submission-information-format.649/ to make sure your map fits within the requirements.
I will also be moving this thread into the map submission subforum, as you posted it in the main parkour forum.
Thanks for submitting your map! I hope to see more maps from you in the future.