In Vacation Isle, players embark on a magical journey to help a mermaid princess build her dream castle. The game involves popping bubbles by matching three or more of the same color, with each cleared level rewarding players with precious pearls. These pearls are then used to construct and decorate the mermaid’s castle, bringing it to life with beautiful designs and upgrades. The game combines the fun of bubble-popping puzzles with the creativity of castle-building, offering a unique and enchanting experience.