Drag a block from the tray into the box. Tap a block to turn it.
Letters in a straight line that spell a word vanish. Words read left to right or top to bottom, and some levels allow diagonals.
Clear every block to win. Nothing falls and nothing is timed out: the clock only records how fast you were.
Stuck? Undo as much as you like, or tap the bulb for a hint.
Lock & Clear rules: a finished word turns gold and stays. Tap a gold word to clear it, or the tick to clear them all. Hold them as long as you like, but holding lets stray words form.