In this puzzle, you only have to draw one continuous line.
When you draw on a tile, it will change color from orange to blue or from blue to orange. You solve each puzzle, by making all tiles akin.
There are 96 puzzles on "Normal"-mode and 96 puzzles in "Time"-mode. Each puzzles can have many different solutions. Start with basic puzzles and unlock harder ones.
There are also special tiles. The "Teleport"-tile, teleports the line to another point...