So pretty, though I wish I had more feedback when playing notes rather than just them vanishing when I get it right.
I'd suggest adding a visual effect on the letters when you play a note, and then something when you get the note right.
Also I didn't quite feel like I was playing the music just yet (felt like synch issues but that also might be because I'm bad at rhythm games ;)), but that's me nitpicking, this something very hard to do in such a short time frame!
The music and graphics go well together, you did a good job, hope you had fun making it! :)