Flood Fill is an extremely enjoyable puzzle game. Your goal in this game is to fill each piece of the area with one of the four colors, but make sure no two same colors touch each other. By using your mouse to touch a shape, you can fill it, and use the numbers 1, 2, 3, and 4 to switch between colors. Surprisingly, this sounds much easier than it actually is. As the levels progress, the forms become more and more complex, and there are an increasing number of parts that need to be filled.