Place a marble, then rotate one of the four 3×3 quadrants a quarter turn — everything on the pitch keeps moving. First to line up 5 in a row — before or after the rotation — wins.
The board is split into four 3×3 quadrants, each tinted a different colour. Every turn has two parts: place a marble on any empty circle, then rotate any one quadrant (your choice, even a different one to where you just played) a quarter-turn.
The two small buttons at each corner rotate that corner's quadrant — clockwise or counter-clockwise — and are coloured to match it, so there's no need to pick a quadrant separately first.
5 in a row — horizontally, vertically, or diagonally — wins, and it counts whether it appears right after your placement or only once the rotation completes. If a rotation happens to complete a line for both players at once, it's a draw.