After I beat this game, I said it was good but overrated. I still say that, but I have to say, this game really leaves a great impression on me, and that is, perhaps, what makes it so powerful. The whole experience--though short and pricey--is addicting, absorbing, and thought-provoking. I like the subtlties of the music and story, but I really think just a little more emphasis on those departments could make Limbo 2 even more excellent.
It is also a game I desire a sequel to. That says a lot, since I usually don't want sequels to original games.