Hello Kontarix,
I regret to inform you that your map is being rejected.
The theme is original, as we don't have any maps relating to "PewDiePie" yet, so good job on that!
The build, while being accurate to his actual chair, could be better. I recommend that you use different varieties of blocks in your build, as opposed to using only wool (Maybe some coal blocks, or redstone blocks, just for some examples.)
The parkour is a bit repetitive with the use of fences, soul sand, ladders, and ice. I recommend you incorporate different jump styles throughout the entire map. You can look at recently accepted maps for some examples of these! The length was good for the difficulty, but some of the jumps were impossible with speed I.
Thank you for submitting your map, I would love to see more submissions from you!
Have a nice day,
Kristina