3DS Demos will be coming to the US Nintendo eShop starting tomorrow (2012-01-19, US). All the demo games will be for free and more titles with different genre will be added gradually. Please take note that as of this writing, it's only 01/18 in the US.
Pyramids is a platform and puzzle game for the 3DS available through the Nintendo eShop. You may be able to relate it to the game Solomon's key back in the NES days, except that this comes with better graphics and 3D!
During its first week launch, the PS Vita sold fewer units than its competitor (the 3DS) did. During the second week of its launch, even more devastating sales figures came out prompting retailers to make an unofficial price cut.