Thanks for playing and letting us know what you found, glad you enjoyed it!
What you're seeing is definitely unintentional behavior, but actually it's central to the two speed run techniques that me and the other dev ended up finding :D Instead of jumping, if you let yourself swing but keep mashing both of the grapples, you get a little speed boost from each grapple and can reach speeds way faster than swinging normally. Alternatively, if you aim the grapples at the far wall instead of the ceiling, you can reach insane rotation speeds; Then if you jump and bump the ceiling, you can launch yourself then guide toward the goal. We've been perfecting these techniques, and have gotten times of 2.x or better for every level XD