Well, if this isn't the definition of "Short and sweet"!
Being this up-front with philosophical self-inquiry in narratives is risky.
It's easy for it to come across as overbearing, cheesy, or pretentious...
But I think you walked that fine line successfully!
There were a few truly special little moments of ludo-narrative alignment, such as the spring platforms and – my favorite – the "run towards your fears" bit.
Take a mechanic like that, develop it carefully, and expand on it over time, and I'm sure you can make some really interesting longer games!
I'm curious to see what else you'll come up with in the future!