Mermaid Tower Solitaire
Tower's a lot like golf solitaire in that your goal is to move all the cards into a waste pile. The catch is that you can only move a card into the waste pile if it is one less than or one greater than the card on the top of the waste pile. You don't have to pay any attention to suit in this game, and you are allowed to wrap around from King to Ace, or from Ace to King when placing cards into the waste pile. At the beginning of the game you can place any card you like into the waste pile, and when you click the deck, it takes the top card off the deck and places it on the top of the waste pile so that hopefully you can continue building.