Thanks for the feedback! Next time in a game like this, I'll pay more attention to the physics of the character and everything like that.
The difficulty of passing is an ambiguous topic for discussion in this case. Firstly, the game was made for a game jam, and there it is better not to make the game too hard to pass so that anyone can pass quickly :)
Secondly, during testing, everyone passed the game in very different ways. It was too difficult for someone, and someone copes too easily. I still don't understand what exactly it depends on.
Anyway, thanks for playing