I might actually keep the music player out. Instead, maybe take out the dresser, since the only reason I wanted it in the first place was to display the villager pictures; if the color doesn't clash, maybe a harpsichord would look nice there (I'm happy to know that it was invented sometime during the middle ages and the early version of the piano, which is shaped just like the harpsichord/grand piano; I looked that up last night ). I did use to play the piano so adding a little more of my personal taste into a game inspired bedroom would be okay, perhaps. :]
Oh, I think a harpsichord would look very nice in the room, maybe with a minimalist ottoman as seating in front of it. You don't always have to follow your game inspiration exactly, I know my Fallout: New Vegas town ended up with a lot of little changes and personal touches from it's game inspired locations.