Despite its simple design and casual accessibility, Audiosurf has a deep and complex scoring system. Song runs made by Puzzle characters (characters other than Mono) can produce a nigh-infinite number of block and timing combinations. Combined with random factors such as white blocks and powerups, the observation of this scoring system cannot define perfection for a given song. Because of this, the Puzzle characters introduce a sort of "free form" scoring competition. Players must harness not only reaction time and muscle memory, but they must also consider a wide variety of character techniques and song properties.