Very well designed! I enjoyed a lot the way how you teach the player how things work in different levels and your screen rumble feels awesome.
The only point I struggled with was the start of a few levels where I was pushed directly into some danger and that lead me sometimes to a lot frustration. In many hardcore platformers there is a litle rest at the beginning of the level so the player can start to focus on the problems (obstacles) in the levels.
But overall very good game!