Mustang Spirit Cash Stacks is an online slot developed by Ainsworth that’s built around a 5-reel, 3-row format with 100 pay lines. Take a trip out West with this slot. The reels are set against the backdrop of a desert, where only a few rocky mountains and cacti can be seen. The game symbols include many Wild West animals. The main gaming feature, Hold’n’Stack, gives players 5 free spins with random multipliers. This slot can be played in two game modes: for real money or virtual money (demo mode).