Celestia

Any five or more matching symbols touching horizontally or vertically pay as one constellation. Four size tiers — 5–6, 7–9, 10–13 and 14–24 — mean a large cluster is worth far more than the same symbols split into small ones.

Every paying cluster bursts and the board tumbles. Fresh symbols fall into the gaps and the chain keeps resolving until nothing connects — one spin can pay many times before it ends.

Three, four, five or six chests open 6, 8, 10 or 12 free spins. Landing more chests during the round retriggers it, so a hot start can run far longer than the spins it opened with.

In free spins every cell that pays banks a multiplier onto the board — and it never resets. The grid compounds spin after spin until the sky itself is the multiplier, up to ×512 on a single board.