I had no idea what I'm doing and made it nevertheless. :'D Very original concept and also the audio is really epic and kept me playing. But as a musical layman I had the feeling that I missed something to understand it completely. I also asked my girlfriend, who plays the piano, if it's a system that she knows. But she said that she does not get it. So I kept smashing the buttons as the instruction said. :D
I liked the feeling that I have to focus on something new and to learn something. Nice game concept after all! :)