Swipe left and right to rotate the donut. Collect a falling wedge by spinning the matching colours to the top of the donut.
A match adds a segment of glaze to the donut. Glaze the whole donut to complete the level.
A mismatch removes 2 segments of glaze from the donut: the incorrectly matched segment and one that matches the falling segment.
You start with 3 lives. If you gain some segments, and then lose them again (so there's only one row of glaze left), you'll lose a life.
Matching 5 in a row gives you +3 points. Collect 10 streaks of 5-in-a-row to gain an extra life. Get bonus points the closer you match the colours of the falling wedge with the top of the donut.