Each island is made of an explicit number of tiles. By clicking a yellow ground-tile it will transform into a blue water-tile and the other way round.
The goal is to separate all islands from each other and connect all waterways horizontal or vertical.
Watch out: The waterways must not been disconnected nor build an coherent square!
Just click on the tiles to transform them. The small tiles above the playing field are showing remaining faults at islands or waterways.
The team at FeliGames wishes a lot of fun!