Move one letter from one word into the other. Leftover letters stay in order.
Tap a letter, then a landing slot on the other word.
Drag works the same way. Check only counts when you submit.
Hint 1 tells you whether the top or bottom word donates. Hint 2 tells you the letter. Reveal ends the round unassisted.
A new puzzle arrives at midnight in America/New York. Progress stays on this device.
Practice has twelve extra rounds and does not affect your streak.