Any bonus symbol triggers top row stack. 3 or more bonus symbols anywhere triggers the free spins feature.
Wild substitutes for all symbols except the bonus symbols.
When bonus symbol lands, the symbol above it in the top row becomes 3 identical symbols.
3 or more bonus symbols triggers 10 free spins. Top row stack positions are held for all free spins. Additional bonus symbols trigger wild stacks.
All wins pay left to right in any position. Winning symbols explode and are replaced by new symbols.