In Phantom Knights, dive into an underwater adventure as a monkey equipped with flippers, a mask, and an air tank. Your goal is to collect coins, treasure chests, and air tanks while avoiding sharks and underwater mines. Swipe up or down to maneuver and dodge obstacles in your path. Treasure chests yield more coins but appear less frequently, and air tanks help you maintain your oxygen levels. Keep an eye on the air gauge, as it depletes over time—collect air tanks to stay underwater longer. Survive the depths, gather as many coins as possible, and see how far you can go before the hazards of the ocean catch up to you!