The 3DS might have been launched, but that hasn't prevented developers and publishers from playing with DSiWare.
Popular PlayStation Network Minis title, Sanuk Game's 3D Twist & Match has you rotating many, many objects to fit specific 'shadows.' The faster you do it, the more points you earn.
It's a fun little arcade-style game, and it's nice to see DSiWare continued to be supported, as the 3DS hasn't got an online shop yet. It's only going to set you back 200 points.
That said, we're hoping Sanuk Games also has plans for a proper 3D version of the game for 3DSWare, because it would be perfect for this kind of game.