Return to Dinosaur Land serves as an sequel to Super Mario World, continuing the story of Mario and Luigi returning to Dinosaur Land to find Princess Peach, who's gone missing before a party, leading them to suspect Bowser, and requiring them to explore new, challenging levels across six new worlds to rescue her. The game maintains the classic SMW look and feel but adds brand new stages, distinct themed worlds (like Mushroom Plateau, Wiggler's Woods, etc.), and a save feature after every stage, offering a fresh but familiar adventure for fans.