This was quite a pleasant experience, in all sense of the word. Let's discuss,
The good things:
I would like to highlight your great usage of music to elevate the experience. It is almost standard protocol nowadays for games (indie and AAA alike) to use music to pair with the experience but it's still very appalling to see it in action, no matter how many times you've seen it. Love it!
Simple sprite art, great 2.5D implementation and great colour palette. Give your artist some credit on my regards, and I also see him working on the music too! Good job dude. Absolute love it, you've definitely understood the theme of the game and really outdid yourself here.
I would also like to highlight your game design decisions, I think your approach to a very simplified game with minimal conflicts really helps with your narrative choices here. The game opens with a quote and that sets a tone to the game which I think you met very well. This already reminds me of other games like Flow and Journey, where there are minimal (but not zero) amount of conflicts and circumventing them are both important, but not mechanically difficult.
If I were to have any caveats:
It would be that this is only loosely tied to the theme of joint together. The originality falls as a result. HOWEVER, this game can be expanded with an overarching plot, a bit more world, give it some charm, a little more fluorish on the gameplay and you could definitely make it a standalone release. Hell, if you worked on the soundtrack some more, you could sell it too for some side change.
Love to see it, I'll be following what you do next time!