Stellar Cascade. Winning symbols disappear and new ones drop in their place. Re-evaluate, repeat — up to 3 cascades per spin. Land 3+ scatters anywhere to win 6 free spins. Tuned around 90% RTP.
A spin evaluates wins on enabled paylines first. Every symbol that contributed to a win is then removed. The remaining symbols drop down to fill the empty cells, and new symbols are drawn from the RNG to refill the top. The new grid is evaluated again. This repeats up to three times per spin — and the same paytable applies on every cascade.
If 3 or more scatter symbols land anywhere on the grid during a paid spin or a free spin, you win 6 additional free spins. Free spins use the same math as paid spins — there's no boosted multiplier or hidden mechanic.