I love how good the feedback to the player is. You interact with the required objects, one of your chains disappears with a nice effect. And the controls are very well explained, including the interaction prompt, that's very nice to see.
The music is a really good fit. Perhaps the sound effects could be a bit louder, as they are hard to hear with the music.
Platforming feels really good, the jumps are well measured. The only thing I would say is that me, personally, as a random player, I expected to be able to jump from under a platform without colliding with it (Mario style, I guess :D). But that would definitely impact level design, so it's not something to change lightly.
Very good job!