Lexaloffle has released Chocolate Castle, a new casual puzzle game for Mac OS X and Windows. It costs US$19.95, and a 12-puzzle demo is available for free.
In Chocolate Castle, you must clear each room of chocolate pieces by arranging them into large connected blocks and eating them. It sounds easy but it's quite challenging -- the game features 120 puzzles and a level editor that lets you make your own puzzles after you've defeated all the included ones. You can copy and paste puzzles from the editor as text, which you can then share with other players by e-mail or through Lexaloffle's web site discussion forums.
System requirements call for Mac OS X v10.2 or later.