VersionTracker and the Get Info on this file state that it is version 1.3. However, within the game itself, the version number is 1.2 build 33.

Whichever is correct, this download from VersionTracker is the one to use. Downloads from Reflexive Arcade, Big Fish Games and other places put the game within a 'wrapper' application that puts an annoying window on your screen when starting and quitting. Essentially, you have to launch the game then click a button on the wrapper and later quit the game and then quit the wrapper. Yanking the actual game out of the wrapper-game package does not work.

The game itself is great. I wish the company would port its other games to the Mac.