I want to preface this review with this: you made wonderful progress despite being burnt out. It's no small feat outputting all of this; well done.
Open Sky was wondrous and a perfect stargazing track.
Shooting Stars felt like a night-time platformer, it seemed to have more action than I'd have imagined for a puzzle game.
The Cycle Repeats, I'm aware it's the puzzle completion track, but this feels more like the puzzle main theme to me. This is the kind of track that I could find myself getting lost in, when trying to solve a puzzle. Relaxing, dreamy, letting me take all the time in the world.
Summer Stargazing is a banger of a credits theme; you managed to basically cram in a vaporwave hit. This feels like a standalone hit.
All in all, this soundtrack felt dreamy and full of awe, with your instrument choices especially. Were they cohesive for a puzzle? I suppose it depends on the kind of puzzle being made, how much action is put into it, how relaxing or not it is. It was, however, an enjoyable listen. All the very best!