I like the Zuma/Luxor games a great deal.  This one expands on the concept quite nicely with different game modes and items/upgrades you can buy (with game coins) at a "store".  The whole thing has a very massaged feel to it.  Looks like they spent some quality time on it.  Here is 
Gamezebo's take on it.
Assuming it's a Mumbo Jumbo game to begin with, here is 
the official link.  It's all over the other places that carry casual games too.