The jump actually goes higher the longer you hold the jump button, which is why there’s a high obstacle early on to teach that mechanic.
That said, I agree the game is clearly very difficult. I probably didn’t fully consider that most players won’t spend a long time mastering it. It does get much easier with practice, but I agree it should’ve been a bit more forgiving, especially since you’re not the first person to mention this.
Thanks a lot for the rating and the detailed feedback, I really appreciate it.