LotF is a really good book. It drags on a bit at first but it gets really dark/eerie later on. Filled with symbolism/double meanings if you pay close attention to Golding's writing. Have you read it?
@Xdqwerty, Osu! Tatakae! Ouendan! is the Japanese version of the game, different settings/characters/songs but otherwise identical mechanics. I played that before I knew about Elite Beat Agents lol. Both fantastic games https://en.wikipedia.org/wiki/Osu!_Tatakae!_Ouendan