This has to be my favorite entry so far. The concept itself is so original and poetic and the whole atmosphere is so peaceful I love it ! The art is good, the music awesome and the gameplay in itself is very intuitive and even pretty fun ! The physics of the melody is a bit hard to control and I did get stuck at some point but for a first unity game, this is really awesome !
Just for the next jam, be careful for a few things about your game page. The name of the downloadable files should match the title of your game and you should tell itch.io that your build is a Windows one. And try making a WebGL export, it'll easily triple the numbers of ratings you'll get!