Character control... it's hard. The idea is very interesting, but I think you've gone a bit overboard with the difficulty. I understand why the character slides on surfaces, he's made of butter, everything is logical and there are no questions, but how he is thrown through the air under acceleration, it's just indescribable. It seems to me that if you make the movement through the air smoother and more controllable, while leaving the moment of sliding on platforms, there will be an ideal combination of difficulty and enjoyment from the gameplay