Like the other reviewer said, the fact that you can make vertical and horizontal connections is a big plus. Absolutely fantastic "glassy" graphics, very nice sound effects, very cool "sparkly" effects. The so-called "new agey" music didn't bother me at all, very soothing.
One star docked for stability-it froze on me late in the game. I just updated to OS X 10.4.3 prior to playing-I wonder if that had anything to do with it.
Anyway, my money's on the way!