Quite nice! Would benefit with base text dialogue skip/fast forward functionality as texts are appearing very slow - would work with full audio narration, but slows the experience a bit as everyone reads differently I guess.
Minor flaws with screwdriver going through other objects (just changing the angle a bit would fix this) and in the end was a bit confused and thought it was a bug, when box started to close but we haven't put back the main cylinder - could be also added some narrative bit about shaping pins and the song together, or just changed the order somehow of making a sketch for the song first, adding cylinder in, and only then close and carve the lid, as this feels like a finishing touch.
Also I really missed the turn of events as it was surprising to read about "she was weak to turn wind up the key" - just small narrative nitpick.
Pretty enjoyable story experience!