Hi,
the build could be improved a bit, but thats not my main concern... I didnt try the parkour, but it seems u used just fences, ladders and stoneslabs... Try and add more variety to it: use jumps like vines, flowerpos, chests, enchantment tables, brewing stands, trapdoors, water and so on... Also 86 Jumps is a bit long for a hard map. And there are just 3 Checkpoint on 86 jumps which seems a bit low
Note: Im not a map judge this is just my personal opinion