Hello Spidereye99,
Unfortunately, I will be Rejecting your map.
The theme is somewhat original, there are a few ore/mine themed maps, but none exactly like this. The build isn't great, as it's made up of a few smaller island areas. In the future, try to have one or two larger main builds that are relevant to your theme, then incorporate the parkour into that, as having an excessive number of jumps floating over the void can make your map look a bit messy.
As mentioned above, the parkour is very repetitive. Try to experiment with a larger variety of blocks and items, as well as the way you utilize these, to create more original and enjoyable jumps. This will make your map more fun to play.
The difficulty is good for an easy map, but the length is far too long for a medium map. It is best to keep medium maps around the 40-60 jumps range.
Thanks for submitting your map! I hope to see more maps from you in the future.