The Rolling Reels mechanic kicks in whenever you land a winning combo, and the winning symbols are thus removed from the grid. New and/or existing symbols will then tumble down to fill the gaps, and the process repeats as long as you keep winning.The Bonus Round triggers when you land at least 4 diamond scatters in the same rolling reels sequence, and this awards 12 free spins. Each additional scatter above the minimum of 4 awards +5 extra spins, and 3 or 4 scatters on a free spin awards +5 or +10 extra spins, respectively.