A game I made for a friends daughter. She asked for a game where you play as Elsa and sing let it go. Its a mix of "guitar hero" and pong. (the more notes you miss, the lower in volume the vocal track goes.
The notes are being read in realtime from a midi file that has just the melody, so their height and positioning is "mostly" correct (its hard to sync midi and analog when they weren't made by the same person lol)