Roto16 comes from John Swensen. The object is to get the numbers in order by rotating groups of 4 tiles at a center point.
Look at the image: the 4 tiles in the upper left corner are rotating. When you're done with that group, you can place the center of rotation in between the 11, 8, 2, and 12.
This concept is not new. But it's hard! I played this game for about 10 minutes and couldn't switch the 15 & 16.