Nice little game with a simple thought - support developers instead of piracy :) I like the quiet music and the atmosphere
There is a lot of potential to develop and improve the game, for example:
1) Add the ability to zoom. Because sometimes it's hard to read what's on the notes.
2) Add an explanation of why notes appear over and over again. Maybe the hero has a disease and forgets everything...
3) You can add more content, because the game is way too short.
Anyway, good job!