The main game takes place on a cruise over 10 different countries spread across 60 levels of play (6 levels for each country). Each country has its own unique theme and graphics as well as its own custom music.
Each country has a set of new card layouts which can be unlocked and played via the Free Play mode. You unlock layouts by finishing a game and clearing all of the stockpile cards as well as the cards in the playing area. This is usually pretty easy to do if you play well.
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