These special symbols will collect all coin values present on the reels and apply them to the. Set against the breathtaking African plains, the jackpot game's Rolling Reels mechanic sees stone symbols explode as great beasts made of stone. . Also, gold coins can appear with 'boost' text. Set against the breathtaking African plains, the jackpot game's Rolling Reels mechanic sees stone symbols explode as great beasts made of stone. These special symbols will collect all coin values present on the reels and apply them to the. Also, gold coins can appear with 'boost' text. Set against the breathtaking African plains, the jackpot game's Rolling Reels mechanic sees stone symbols explode as great beasts made of stone. These special symbols will collect all coin values present on the reels and apply them to the. Also, gold coins can appear with 'boost' text.