Hoi Wolfy_Ranger,
Sorry to tell you that your map have been rejected.
The theme is not original, since there is already some "Mineshaft" maps, the build is not good, it's messy and not really attractive, try to build your map on/in a main build, and not floating around like you did. The parkour is not good too, it's repetitive, since there is mostly normal and ladder jumps (with some fence), try to add some ice, soul sand, slime, iron bars.. in your map. I could talk about the difficulty, but your map would probably fit more a hard than something higher, even if it's maybe way too short.
Thanks for submitting your map, would be really good to see more maps from you !