The Pebblez Expedition iz a challenge to complete a seriez of Pebblez Gamez of increasing difficultiez. You must complete the gamez in order, and you can try as may timez az you want to play a game. Every time you play, it generatez a slightly different version of the gameboard with the same factorz (i.e., size of board, number of colorz, identified Pebblez, double-pebblez, etc.). If you've passed the game and return to the home screen (or quit, etc.), you cannot replay that game.    

On the Home Screen, there iz a button to either Start or Continue the Expedition.

If you have already begun the Pebblez Expedition, it will show your current Level and Total PebblezCash (Pz) earned in the Expedition. When you replay gamez in the Expedition, your highest Pz of any attempt iz kept.  

If you've begun the Pebblez Expedition, it will have a Show Statz button. Tap it to see some overall statisticz for your Pebblez Expedition gamez and top score for each game.