Waffle

Rearrange the 21 tiles into six words — three across and three down. Tap one tile, then tap another to swap them, or drag one tile onto another.

A right letter, right place — it locks and can't be moved.
A the letter belongs in that word, but a different tile.
A the letter isn't used in that word.

Solve it in as few swaps as you can — par is the target. The lightbulb glows two tiles worth swapping (three hints per puzzle), and the ↶ button undoes your last swap.