Interesting with more time put into it, I like the idea of the grapple hook. What I feel this game really lacks the most that would help its playability is a sense of direction. I know, i know its probably meant to be about exploration however you are severely punished if you make a small mistake which does hold back from just floating and exploring. Sadly when you die I could not find a retry button and had to refresh the page a few times to play again.
I would love to see this explored more and a few adjustments made to help the player know the right direction to go.