Hello slownerd,
Unfortunately, I will be
Rejecting your map.
The theme is original, but the build isn't great, as it feels quite flat and blocky in places. I would suggest trying to add a bit more shape and definition to the build.
The parkour is good. You used a great variety of blocks and items, creating original and enjoyable jumps, so well done!
You also implemented the parkour into the build well, with minimal floating jumps, which is good.
The difficulty is good for a medium/hard map, but the length is far too short, and is more suited to an easy map. 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.
Thanks for submitting your map! I hope to see more maps from you in the future.