I played through Bicolor a few times. It was fun, but not very challenging. I first completed entire game in a few hours on a flight. This is a great sequel in which ternary logic replaces the familiar binary logic. So far, I haven't played through more than about twenty levels, and as such haven't been challenged yet. I expect to be, though!
If looking for other similar games that stimulate the mind with awkward systems of logic, check out "Voi." It's a similar puzzle game featuring XOR logic.