From WiKirby, your independent source of Kirby knowledge.
"Level Select" is a theme from Kirby's Dream Land 3, where it can be heard when selecting a level. This theme, like all the other music from its origin game, was composed by Jun Ishikawa. It can be found as the 41st track in the Sound Test.
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Because this theme plays in a place where someone would not spend much of their time on, "Level Select" is a rather short and simple theme. This theme appears to be in the key of G major and in 6/8 time. The theme is played with what sounds to be multiple wind chime-like instruments playing a simple fourth to third motif repeatedly in a fashion similar to "Sparkling Stars", and the sound of wind, which gives the theme an ambient or ominous tone.