Deltarune is Toby Fox's episodic role-playing game, first released in 2018 as a parallel story to Undertale, with music playing a central role in its identity. Short melodies from the game are frequently remixed by fans into ringtones, covers and meme sounds, and this marimba version follows that tradition. The bright arrangement spread through soundboards and short video edits because it is instantly recognisable to players yet short enough to work as an alert. Its link to Undertale fandom helped it travel beyond gameplay clips into everyday phone and notification jokes.