In Super Yum Yum Retro, you play the role of Leon the Chameleon, guiding him in his quest to recover his children, who he lost in no small part due to his terrible parenting. Super Yum Yum Retro is an iDevice adaptation of Leon's second adventure, in which the same plot occurs, so it doesn't really provide any more history or answers about him (for example, why does Leon have custody of these kids?).
There are four worlds with several puzzles in each, all based around guiding Leon and his tongue through a maze of fruit. Hidden among the puzzles and nutrition are Leon's obedient children, who he must save from peril.