Yoku's Island Express is an open world/metroidvania-style pinball adventure that seamlessly combines platform navigation with pinball mechanics in a large open world setting. Players follow the journey of Yoku, a dung beetle who arrives on Mokumana Island to take on the role of the new postman. However, the island is in turmoil as the ancient island God is trapped in a troubled slumber, causing quakes and storms that disrupt the islanders' lives.

In this unique and quirky adventure, players will experience handcrafted visuals and engage in various activities such as soaring through the air, vacuuming explosive snails, battling creatures like Screetch, aiding starving lemurs, uncovering the secrets of the Fruit Altar, awakening an ancient god, and assisting Yoku in rebuilding the island post-office.