Nice and fun little experience. I loved the sound design and how it was linked to the use of the grappling hook. Puzzles gave me multiple options to complete them and often it made me feel like I was "outsmarting" the game by coming up with my own method, which is a very good thing because it allows a player to feel more connected to the gameplay experience.
I would suggest that the grapple hook need not be necessary when push/pulling crates in melee range as its a little distracting to be wielding around this now rigid rope, however that is a very minor nitpick.
Loved it, would love to see more.