Eliot from Hackaday tipped us off to the existence of this nifty concept trailer for game-in-development Limbo. The teaser trailer scores high marks for its beautiful art direction and suggestive physics, but then again, so did the trailer for Killzone 2.
Still, the game's lead designer (Arnt Jensen) has crunched his way around the game block a few times, so we shouldn't be so quick to assume that this won't eventually become a real game, graphs be damned.
In fact, we'll assume that this project will get done, and we'll encourage you to join the effort, if you can code C++. Good luck!