Hello! Thank you for making this experience! It was really relaxing to wander the island and search for this musical ghosts :D I also enjoyed waiting for the ghosts to come near each other so that I could hear two songs simultaneously. It would be really cool if the ghosts also interacted a little bit with the player. If one ghost would be interested by the player and follow them around a bit, whereas another ghost would try to run away. I think this could give them even more personality. Just an idea I had though :)
Maybe one point, for me the game was quite dark, so a brightness slider or something similar could be nice I think ^^
Good job on the game!