Definitely an interesting concept and a pretty well executed game overall. I'm currently just getting the high score. But otherwise the only real critique I have would be the rope length and the controls.
Specifically I'd say the rope length in comparison to the screen is a bit weird. The rope is quite long in comparison to the relatively short height of the screen leading to a lot of situations where you end up just barely falling off just before or just after a grab. So I'd say either shortening the rope, or more likely zooming out the camera would really help that.
Otherwise though a few points:
- Adding some ability to remap the grab keys, and possibly the movement keys just to make it easier for people to adapt to the semi weird controls.
- Moving between the two walls across the middle gap is an interesting idea for adding some extra difficulty, especially because it's pretty in line with the climbing concept. Though I'd say in my experience it seemed pretty difficult to cross the gap with momentum, but crossing it with both characters just flying across the screen actually worked a little too well.
World Record right here ^