Second run, this time for the one read you asked for: the first jump in 1-1 is a teach, not a wall. I understood it at once – hold, the dotted arc grows, let go when the mark sits on the next platform – and the first gap is short and the platform wide enough that a rough first hold still lands. No frustration there.
One thing I would look at: the whole screen moves when the little guy jumps. If that is intentional it is a bit much for me – the camera swing pulls my eye off the arc right when I want to watch the landing mark. A calmer camera (or less of it on the short jumps) would keep the focus where the game wants it.