Breakfast

After a cruise ship starts to sink way out in the middle of the ocean, you, a very hungry, very big, red fish with a lot of pointy teeth, have yourself an all you can eat buffet. You wait on the seafloor for the passengers to reach you. Move left and right to catch them. After eating a certain amount of one type of passenger type, you will level up and get access to the other more meaty types that drown at different speeds. But be warned, if you fail to snap up enough of them you will starve as a result. Happy hunting!