Gyre Lock

Swap matching runes to clear stone, then tilt the key through open corridors. First park it on the switch at the right of the second row: the stone below it must still stop the slide. Only then clear the lower chamber and reach the exit. Clearing everything too early strands the switch. Ten exchanges/tilts available.

Tap controls, or Tab then Enter/Space. R restarts. Every action is turn-based; take time to plan.

Rune clearing creates routes for a gravity-driven keystone.