Can you imagine being stranded on a desert island? When your only hope is a message in a bottle, that's in the middle of the sea? Its time for you to be the bottle and try to deliver the message as far as you can! And remember: You- are the bottle!
Here are some of the game characters - the standard bottle, and one of the final characters- a fridge. Every 'hero' that you play for has not only their own form, but their own physics and characteristics that may or may not help you in different in game situations.