Really clever concept that I haven't seen in too many puzzle games. I would highly recommend this to players who want to play something that you can just relax and have little pressure. The tutorial was great at explaining how the game works. I do wish the game went more incrementally from a 4x4 to an 8x8, but that's mostly a nitpick. The autosave function is also incredbly helpful. I do wish switching between lighter and darker colors was a little easier though, and I suggest it should be with a mouse scroll rather than two clicks,