Limbo is a wonderful black-and-white game from Playdead that has been a marquee title for the Xbox 360's summer of arcade (we like it). LittleBigPlanet is a modder's delight on the PS3. Of course, someone combined the two.
Above is a Limbo-inspired level made in LittleBigPlanet. It is called, Limbo, Son of the Forest. The creator is Bra2008.
For comparison, this is what Limbo really looks like:
I haven't tried the level myself yet, but look for it on the PS3 and let us know how it is.