In-Poculis Mahjong (http://www.in-poculis.com) is a new Mahjong
solitaire game freeware for the Mac. The US$15 game comes with 120
levels and six themes: Christmas, Halloween, Asian, Easter,
Wonderland and Future.

Here’s how the game is described: “How to play: find matching mahjong
pieces amongst the plethora and click them to get them off the
screen. All of the mahjong pieces can be cleared, but it takes some
discipline, strategy, and a little bit of luck to win the five medals
of each theme.”