Waffle is a crossword game that you can play for free on a web browser. There you are given 15 swaps to change the position of the letters so that they are in the right place.
With each letter in the right spot, they will turn green. Meanwhile, the yellow tile is in the right word but in the wrong place, and the white tile is not in the word. Drag and drop to change their positions and win within 15 turns.