Given the enduring popularity of solitaire, it's easy to understand why so many developers feel compelled to put their own spin on the classic card game - even when the end result, Solitaire Cruise, is something that is so far removed from the original concept that it can barely be called "solitaire" at all.Although the game uses regular playing cards, Solitaire Cruise actually has a lot more in common with the tile-matching game Mah Jong than it does with traditional solitaire. It's a concept that works with varying degrees of success.