A very nice take on the theme. The motivational mentality, ending it with the rejection letter which is such a crushing feeling after climbing such a tall mountain. Then the ideology to keep trying again and pushing forward. Was all great. Loved the sound tracks made/chosen for the game. The platforming was quite well done too, maybe slightly a little too floaty for my taste.
The only portion of level design I didn't enjoy too much was the "intrusive thought" portion. It was a bit frustrating constantly getting pushed, dying, resetting, but not being sure where to reset at. There are times where I would reset and still just instantly get pushed to the spikes. I can see the design metaphorically, but from a game design enjoyment perspective I think it's a bit too harsh.
Other than that one section for me, the rest of it was super fun and had great meaning behind it. Super nice job on it!