I did try again, and wow, it was so enjoyable!
In some ways, this is my kind of game; point-and-click narrative peppered with plenty of puzzles! Your group made the jigsaw work! I have wondered about the coding that goes behind it - good job! The idea of humanizing the spirits was a good touch, you have created quite an imaginative world, here! The unusual color palette with the 'pop' colors come across as so authentic too.
I think you have already realized, but a little more feedback will go a long way. Some kind of sound or visual effect indicating when I am doing things right. Also, the inventory system seems a little buggy, sometimes it is not quick to respond. Also, once I unlocked the music piece, it seemed like I had no way to reference it again? Next time, I took a screenshot!
But oh, I love love loved the harmonica!
But alas, I did get stuck again, the UI does not seem to be responding while I'm trying to make anti-fire in the beaker! But I'm glad I played this far - this is a sparkling, immersive game; feels like just the right amount of challenging!