Great game, elaborate on it!
Thanks for a refreshing logic game that isn't based on something that has already been beaten into the ground here already. I really enjoyed these puzzles, especially being a math major - these puzzles are very interesting to some mathemeticians.
Anyway, the game was thoroughly enjoyable. However, it is begging for harder puzzles needing more colors. Although what was displayed here was certainly plenty for many players, advanced levels for people who really have this type of puzzle down would be greatly appreciated.
As for graphics, not much to say. They were simple, which I really appreciate in this type of puzzle. Anything flashy would just work against players as they solved puzzles.
Overall, 8/10, Make it longer and more difficult for a point, and add a few twists to the classic rules (optional, please, i.e. classic and special play modes).