This is a really cool and easy game, all you have to do is flip the boat. Anytime while the shark swims around the boat, you can hit the Jump button, the shark will jump on the boat and possibly flip it!
Play against the timer and see if you can flip it as quick as possible. The latest record is kept even when you quit the app, but you can always reset the latest record by clicking Reset. Once you flipped the boat, click Load to play again.