Yo yo, WalletInspector!
I'll be giving some input if you don't mind; just a heads up, I am not a map judge, so this is just a personal opinion.
For one, the map is mainly floating and the jump variation is lacking significantly. I would recommend swapping out
full blocks for blocks such as flower pots, fence gates, ice blocks, piston heads, cobble walls, cocoa beans and beds. These blocks will allow you to create a more enjoyable map overall. I would also say you're a few jumps over the medium difficulty, as a medium would have 40-60 jumps; however, the difficulty is fine.
In regards to the parkour floating, I would advise you to create a "main build", so find something to build (structures are fairly easy) and get to work! From there, incorporate the parkour within the build and closely surrounding it!
You can find more in regards to block variation here:
Block Variation thread
As well, the theme of your map is very overused as there are a lot of tree-themed maps on Manacube; thus, I would recommend a theme change to something unique! Try to be creative and create a map that has not been created yet. You can find a full list of already accepted maps here:
Maps list
All in all, a good idea, but it would be even better and more unique if executed differently!
I wish you all the best with your submission.