Please start up the application while standing up. You can dive in the ocean when you crouched. You can shoot the energy ball by tap and holding and releasing it. Tap "Tap to start." to start the game. Shark will chase when the game is started. Please repel with energy ball. When winning a shark, Dunkleosteus appears. When winning Dunkleosteus, Mosaaurus appears. If you win the Mosasaurus, game is finished .