Hi Ryan,
Thank you so much for this message, it really made our day! It's always so lovely to hear that the cozy vibe we're going for comes through right from the first notes.
To answer your question: the music comes from a pack we bought from the artist kounine, the "Wholesome Place Music Pack" (https://kounine.itch.io/wholesome-place-music-pack). We love those piano flourishes too!
As for sound design, we don't have a specific need at the moment, but please don't hesitate to send over your portfolio , we like to keep contacts on hand for future projects, and your approach sounds really lovely.
Thanks again for the kind words, it means a lot!