This game has a really strong art and is really hard but the player movement apart from feeling wrong and unpredictable is just uncomfortable wall grabbing was not explained in any moment but there it is being annoying as hell.
Giving a short introduction to controls can be a good idea but you really shouldn't punish the player for not knowing them yet without even giving some sort of time to get used to them.
In short words it has a terrible introduction.
The idea is really good but it's missing something to introduce the player to the game only after you make the player attached to your game is when you can put a really hard challenge.