Select a puzzle pack to begin playing.
Light every tile.
How to Play TileTurn
Every tap changes several tiles. In Classic, the selected tile and its up, down, left, and right neighbors toggle ON or OFF; light every tile to finish. Cascade starts the same way, then only first-step tiles that became ON toggle their own neighbors after a short delay. Spectrum cycles dark â â blue â â green â; the goal is every tile green. Preview the affected area before tapping and use free Undo to compare ideas. Seven packs contain 140 levels. The displayed move target comes from puzzle construction, not a proof of the fewest possible moves. Finish at or below that target for three stars, within two extra moves for two stars, or complete the board for one.
Frequently Asked Questions
Is the move target a proven minimum?
No. Puzzles are constructed backwards from a completed board. The construction length sets the scoring target; a shorter solution may exist.
Does Undo affect stars?
Undo restores the previous board and subtracts that move from the counter. It is free.
How are levels unlocked?
All seven packs are available. Within each pack, complete levels in sequence. There are 140 levels in total.
How does Cascade work?
First, the target and its four neighbors toggle. After 300 ms, only those that became ON in that first step toggle their own adjacent cells. Overlapping effects can cancel.
What is the Spectrum goal?
Every tile must be green â. The cycle is dark â â blue â â green â â dark â. A tap advances the target and its four neighbors.