Ok, so, it took me quite a few tries to understand how the physics wanted me to act; during this time I was deeply frustrated, as I made the motions I'd expect to work, yet the character flew anywhere else.
Once I figured that out, things became much easier and I actually managed to enjoy the game; I reached the top and got my prize. I thought the mountain was much taller but, thankfully, that wasn't the case (the meters marker not starting from 0m didn't help in that regard).
The one thing that bothered me, besides the initial learning curve, was the fact that you could die. I'd argue that games from this genre do not need a death mechanic at all. The punishment, generally speaking, is falling, unless you manage to ready yourself and grab any available edge; death makes failure excessively punishing otherwise. It was also too finicky, and could happen suddenly for no reason.
Any sort of physical gameplay is an arduous task, nonetheless, so congrats!