Color Junction
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It has a XML file that you could alter to change different versions. Alternate has 15x15, and 4 colors. Much harder has 30x30 5 colors, and Insane has 30x30 (max size), and all 8 colors.
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It has a XML file that you could alter to change different versions. Alternate has 15x15, and 4 colors. Much harder has 30x30 5 colors, and Insane has 30x30 (max size), and all 8 colors.