Yuliu Don't Litter" is a 2D side-scrolling mobile game with enhanced awareness of environmental protection. The game characters are mainly adapted from Hans Christian Andersen's fairy tale "The Mermaid" to create an original game plot. It tells the story of a girl who grew up in the ocean. The mermaid princess, Stingray, was entangled in garbage during a routine patrol on the bottom of the sea. Collect and classify garbage in the game, and trigger different endings according to the clearance conditions.