Tide Switch

Swap horizontal neighbours to make lines of three. Setup swaps are allowed but advance the tide clock. Every four swaps a forecast row rises from below. Clear at least six tiles before that rise, including any incoming-row cascades, to chart a calm tide and earn a brake. Chart four calm tides to win. Call the next tide early when ready, or spend a brake to reset its clock. Watch both incoming rows and avoid the ceiling. Expedition limit: 36 swaps.

Tap two neighbours. Arrow keys navigate; Enter selects. Retry layout repeats the seed; New layout varies it.