Play the halloween themed Tripeaks solitaire game. The game has very nice graphics and music!
As any other solitaire you have to remove all cards from the tableau. You can only remove cards that are 1 higher or 1 lower than the current card. There are bonus cards each level so use those too. For example there's wild card bonus giving you the option to place any card next, a visibility card bonus revealing for short period of time all cards plus the next card in the stack.