Sullyland Nursery Rhyme is a single-player visual novel that immerses players in a haunting narrative set in the holy city of Marenis. Developed for the Nintendo Switch, it features an intricate storyline where players control Amane, who must navigate life-threatening trials alongside her companions to save their town. The game masterfully combines elements of psychological horror with romance, offering players a rich and immersive experience through its unique day-and-night gameplay structure.

The gameplay involves interactive investigation and decision-making that affects the story's outcome, with a total playtime of approximately 55 to 60 hours. Players can explore five distinct character routes, each leading to one of three endings: Catharsis, Lunatic, or Nightmare. The game is visually striking, with character designs by artist miko, and a script that delves into deep emotional themes and traumas, ensuring a compelling experience for fans of the genre.