Hello CajOnion, I am sorry to say your map is being rejected.
Theme: The theme is rather unoriginal, as we have numerous mining-related maps already.
Build: The build is also unoriginal, we have lots of floating island maps, which we generally don’t accept as maps anymore.
Parkour: The parkour was basic, mainly simple block jumps with little to no variation or challenge.
Difficulty: As said above, I found his map to be quite easy, and not suitable for the medium difficulty at all, I’d also argue it’s possibly too simple for an easy map too. I'd suggest giving a read over our map submission guidelines for future reference
https://manacube.com/threads/must-read-map-submission-information-format.649/
Thanks for taking the time to submit your map, hopefully, you will submit more in the future!
Have a good day, and happy map building- Cele <3