After the clearing of a game, the player's Flow score is recalculated based on their performance, though it doesn't impact the game in any way. Each game is part of a stage, which usually ends with a Remix containing the games from the respective stage.
Rhythm Tengoku contains five games per stage and a Remix, Rhythm Heaven and Rhythm Heaven Fever contain four games per stage and a Remix, while Rhythm Heaven Megamix has several lands with four games each, and towers containing four games and a Remix, all still collectively referred to as stages.