In Yoku's Island Express, players control Yoku, a dung beetle, who becomes a postmaster as he arrives at a fictional island of Mokumana.In Yoku's Island Express, players control Yoku, a dung beetle, who becomes a postmaster as he arrives at a fictional island of Mokumana.In Yoku's Island Express, players control Yoku, a dung beetle, who becomes a postmaster as he arrives at a fictional island of Mokumana.