Dualism is a fascinating puzzle game about polarity. It features 160 levels ranging from easy to hard. Dualism requires an iPad with iOS 4.2 or higher. You draw one continuous line on the board and each stone the line touches, will switch its color. Black to white and vice versa. To finish a level you have to make sure each stone in each row has the same color. But be aware, different rows can have different colors! Dualism features over 160 challenging levels. 100 levels are included for free. Enough to keep you hooked for hours. A 10 level tutorial is included, so you can learn to play Dualism hands on. Dualism is Game Center enabled, so you can share all your solved levels with your friends online! Source: The Game Website.