Squid Game is the South Korean survival drama that became a worldwide hit after its 2021 debut, built around deadly versions of childhood games. Its unsettling use of cheerful, childlike music became one of the show's most recognisable trademarks, and clips of its carousel-style melodies spread widely through social media and meme edits. Creators reuse this sound because it instantly signals the show's world, turning ordinary footage into something tense, playful and threatening at once, long after the episodes first aired.