Wild West FreeCell is FreeCell with a twist: the standard game of building four foundations ace to king, four free cells to park cards in, and a tableau you build down in alternating colours — plus pistol action cards that grant a bonus move.
FreeCell's defining property is that almost every deal is winnable with correct play, which makes it the thinking person's solitaire. The bonus moves here soften that slightly, but the planning is still the game.
Almost all of them. In the classic numbered deals only a tiny handful are impossible, which makes a loss a planning error rather than bad luck.
The number of cards you can move at once depends on how many free cells are empty. Filling them all leaves you able to move only one card at a time.
Bonus action cards that let you move any tableau card to the top of a column, collected as you play.