The world you have imagined for this game is rich and inviting and the idea that breath is the game mechanic is certainly innovative. I am excited to see how this comes together as the production moves along. The documentation and work put in so far is intensive and clearly passionate. I must be honest, I had a hard time following how the game will play exactly. I like the idea of the harmonica; I think it innovative and I love rhythm games.
I can tell that you have a clear, well-developed, detailed vision for this game but it may be too detailed for the scope of the jam. I look forward to seeing it as it comes together.