This is the perfect, simple-concept little game that I always play when I need to kill time. Its doesnt require sound, its pretty quick, and you can go back to a puzzle later if you need to. Theres no gimmick of levels or achievements or anything (which is good in the long run), but the different board sizes offer good variety (I find the 5x5 the hardest since they usually lack the symmetry of the 6x6). The hints (one letter revealed at a time) are good, too, when youre completely baffled. This game has seemed to outlast all the other flashier games Ive gone through. If you even sort of like this type of puzzle, its definitely worth getting.