The black and white symbol (Ying Yang) is separated to two halves and your task is to reconnect them. How? Your work is to make them a way for reconnection. There are several types of blocks or wheels, some can be erased some not. Think about the way for both parts of the symbol. At first you will not have to many problems but later the timing is essential. The whole game has twenty levels so the number is perfect for some brain work but without meeting any stereotype. After beating the game you can compare your score with other players.