Each row has a target candy on the left. Press and hold a candy, drag it to another row, and drop it — the two candies swap places.
Make every row full of one candy type to complete it. A completed row turns golden, gets a ✓, and locks — you cannot move it anymore.
Complete all rows to finish the level and unlock a tougher one! From Level 4, finish within the swap limit shown at the top — every level is always possible!
Tip: you can also tap one candy, then tap another to swap them.