Audiosurf and Super Mario Bro.
Imagine a typical sidescroller. The aim is to get your character from one side of the screen to the other while contending with obstacles and enemies. So far, so simple. Imagine if this sidescroller was actually connected to your iTunes library though, and that the very songs you were listening to were actually morphing the course. Obstacles appeared and disappeared as the music played and the type of enemies you faced was in constant flux.
Imagine a typical sidescroller. The aim is to get your character from one side of the screen to the other while contending with obstacles and enemies. So far, so simple. Imagine if this sidescroller was actually connected to your iTunes library though, and that the very songs you were listening to were actually morphing the course. Obstacles appeared and disappeared as the music played and the type of enemies you faced was in constant flux.