We've seen the DSi's camera used as a tilt sensor a couple of times, but Rittai Kakushi E Atta Kore Da (something like Hidden 3D Shapes: There it Is) does something new with it: using the camera's motion sensing to create the illusion of a 3D space, which you explore by moving the DS and changing perspective.
The game itself involves searching these 3D environments for hidden objects. In the level shown in the trailer after the break (which you really should watch to figure out what the hell we're talking about), you're looking for items that, when viewed from a certain perspective, arrange themselves into letters.
Rittai Kakushi E Atta Kore Da will be out in Japan on DSiWare March 3.
