In *Hanafuda Koi Koi*, players compete in the classic Japanese flower-card game, where each beautifully illustrated card represents a month of the year. The main objective is to collect cards from the table and hand to form specific scoring combinations, known as yaku, before your opponent does. During each turn, you match a card from your hand with one on the field, then draw a new card to keep the round going. After forming a yaku, you may stop to bank your points or call "Koi Koi!" to continue and aim for a higher-scoring set, risking everything for a bigger victory.