After playing through both Hexcells and + a few times, I can summarize my review in a single line: the only real fault with the game is that it's too short.

Ironically, that's actually a compliment to the game, seeing as it was good enough to make me want more...

Also, completely separate thought, but rather than start a new thread; I would really like to see a mobile* version of this. *And by mobile, I do mean Android... Thanks.