This is amazing! Can't wait for the finished game! :)
I do have some feedback, though:
- I would accidentally grapple mid-air when trying to boost by jumping as soon as I touched the floor. Allowing players to disable "jump to grapple" would solve this.
- Toggle-in/toggle-out felt really backward to me. I did read the other comments, but since I haven't played Umihara Kawase (I know, I'll fix this mistake eventually...), the current scheme wasn't what I would intuitively expect. So, this could be configurable as well.
- Make cycles global: I'm a big fan of speedrunning, and having cycles continue from when you died makes it harder to plan your movements. At the same time, I can see how this forces players to improvise, instead of simply memorizing the path/movement... This is really a game design decision, so I can see how it's up to what the developer would expect.