Build: Personally, I don't think the build is very good due to its unoriginality and blandness. You just built big versions of MC blocks. This has been done before multiple times. So, it's very hard for us to accept a new map with such a theme because, more often than not, they do the same thing as previous submissions. Furthermore, your attempt feels very mediocre. Sure, it looks like the blocks, but it doesn't mean it looks pretty (or original).
Parkour: The parkour was at most as hard as a difficulty, whose length range should be between 60-80. And, this is 140 jumps (insane-difficulty length). You have to cut about half of the jumps to fit the difficulty, as I can't see this being as hard as an expert or insane at all. Furthermore, the parkour used so many of the same jumps that it felt incredibly boring to do. The first evidence of this is the crafting table segment as it's all slabs. Then you also have the vast quantity of back to back ladder jumps, hh's, etc. You need to be more creative.
I hope you take these criticisms into consideration when submitting maps in the future, good luck!