Braid is a tricky game to review, because when you talk about how appropriate it is, you mean something completely different from when you talk about a violent shooter or beat em up. In terms of inappropriate content, I think a 12 year old could handle the single use of the "B Word", and the implication of a relationship that started falling apart. But in terms of emotional depth...well, it was, at times, emotionally difficult for me to play at 25. Even in terms of sheer challenge of game play, it was difficult for me as well. I think that a very mature 15 year old, ready to deal with the issue of real, romantic love (They do exist...rarely) who is quite good at puzzles should be encouraged to play this game. But there's also a pretty good chance that they simply won't like it, and preferring a game that's a little more straightforward. So to most parents, you probably shouldn't buy this game for your kids, just give a go ahead if they are informed about what the game is, and specifically want it. But I think that, just maybe, you should consider buying it for yourself, because it is beautiful.