I thought the instructions were clear enough. Anyway, thank you for playing and enjoying the game. The first ghost/note you need to unlock is the one that carries the "F" note. How do you know which ghost to target first? Easy. The ghost that doesn't growl when you tap/click on it is the one you need to focus on first. Keep tapping/clicking it enough times to get the "F" note, then you can move in any order you want to unlock the rest of the notes, without losing your progress.