A symbol is part of a cluster if it is horizontally or vertically adjacent to other matching symbols. Only clusters with 9 or more symbols will award a win. Multiple clusters of the same symbol, provided they are not adjacent, count as separate clusters and pay separately.

Each spin begins with identical, adjacent twin reels that are linked together and can appear on any of the 6 reels. During the spin, the twin reels can expand to become triplets, quadruplets, quintuplets, or even all six linked reels. The number of linked reels is random and determined independently for each spin.