There has been an increasing popularity in audio-only games, particularly for mobile devices. These are usually based on spoken-word, sound-effect scene setting, or DJ/musical-instrument simulation. This chapter surveys the field and discusses the concept of games which are entirely abstract musical experiences, presenting a first example based on Minecraft and music memory games: Musicraft. The comparisons with Minecraft can be extended into the idea of a creative mode: a quite natural approach in music-only games which has not generally been considered in audiogame research.