A friend on Twitter brought Shipwrek to my attention, an application developed by Candy Cane in Estonia.
It is a game with a simple goal. There are two docks: one yellow and one red, the player has to guide the corresponding coloured boats to the correctly coloured dock by drawing course lines on the screen for the boats. When the boats reach the appropriate spot at the dock it will load/unload their cargo. Some boats move faster than others and the trick is not to let any of them collide, if they do the game is over. It is almost like air traffic controller for the sea.