I played your map, thanks to this youtuber of course, but as he says many times in his video, some jumps are impossible. I'm not bad at parkour (exept water parkour loloollol) since I did the "easy part" with only 3 fails. The fun fact is that I think that you did all the ending parts with an additional speed 2 effect. Indeed, to give you an example, the ladder legends part, the 92nd one contains 3 jumps that are impossible without speed 2 : there is even one that is super hard with the speed 2 thing! I don't think you really tested your map and just gave up when you couldn't do some parts, thinking these were only possible for pros. I'm not telling you crap, the minecraft physics themselves proove that you did that. other exemples : the double arrow jump is impossible without punch on the bow, the 95th stage's second jump is impossible with speed 8, even if you give the player speed 6; the diagonal no-mos are not like quads, they are like 5 blocks jump with 2 blocks down ! So the no-mo diagonal with 2 snow stratums is not possible without any double jump; etc.... ... etc....
Please rework your map! Ask pros at parkour to test it for real to make it even funny to do, and that means possible to do.
This map is buggy and I abandoned it. I am in the process of creating a much larger, better, and AWESOMER map. Stay tuned!