Really excellent visuals here. It reminds me of that kind of style that Thomas Brush uses and something I'm attempting to learn myself.
Others have mentioned the Z/X control scheme so I wont go too much into it. I think ledge grabbing should maybe be a default and use up/down to jump up or release. I'd definitely consider WASD in additional to arrows, I say this as a lefty who used the arrow keys for every game for the first 20 odd years of his life :).
Climbing the last hill with the larger scaling on the parallax was really effective and a cool moment.