Battle music stages are very similar to a traditional rhythm game. (bagogames.com)
In terms of event music stages, it just recalls people's memories from the games. (bagogames.com)
Gameplay is split into FMS (Field Music Stages), which are generally relatively slow paced overworld pieces, and sees your characters wandering the world and task you with getting as far as possible before the music reaches its conclusion, and you must trace long green lines to help your characters do so. (consoleob.com)