How to play
A click toggles the chosen light and its orthogonal neighbours. Edge cells affect fewer neighbours. Extinguish the whole grid within the click budget; undo restores both the previous board and move count.
Controls
Click or tap a beacon; arrows select, Space toggles, and Z undoes.
Playing tips
- Track which neighbours each switch changes. Pressing the same switch twice cancels its effect, so plan a set of switches rather than repeatedly chasing one lit cell. Hints reduce the rating.