Good puzzles, fun, nothing obnoxious
I played through this entire game myself, and there's really nothing in it at all to worry about. Yes, there's some "violence", but it's all of the most innocuous, totally non-bloody type. It's basic video game stuff, where you swing your sword (or whatever) and the monster your fighting eventually just disappears when you beat it. I don't find that kind of light fantasy combat troublesome at all. As for the rest of the game, there are many puzzles to figure out, which seems better than your typical no-thinking-required videogame. None of it is terribly hard, but it does require some work and some time, and thus not every kid will likely enjoy it. I, personally, thought it was a lot of fun and it's one of the few video games I've ever completely finished.