Balan Wonderworld is an action-platformer set in a musical theatre-themed world where players control two children, Emma and Leo, guided by the enigmatic maestro Balan. The duo explores twelve distinct worlds, each representing a troubled individual's heart, using a variety of costume-based abilities to solve puzzles and overcome obstacles. The game is notable for its vibrant art style, costume-swap mechanics, and its development by former Sonic creators at Arzest.