The grapple mechanics seemed pretty familiar at first, but it turns out they can interact in a pretty cool way every once in a while: if you grapple while falling really fast, you can transfer that linear momentum straight into angular momentum and then yeet yourself off in whatever direction you want. I don't know that I got any explicit reward for doing this anywhere, but it was fun to schmove for the sake of schmovement.
I unfortunately was not able to make it all the way through the first big level. The first time it seems that I got caught in an inescapable area in the bottom-left. The next round through was going well until I clipped inside the wall and couldn't find a way to get myself back out again.