1. Place a light source
Tap a cell to put a source there. Tap it again to take it away. The number inside the source is its strength.
Place light sources in the dark maze so that every clue number is matched exactly. Use exactly as many sources as the Sources counter says.
Tap a cell to put a source there. Tap it again to take it away. The number inside the source is its strength.
The source cell gets its full strength. Each step to a neighbour cell (up, down, left or right) gives 1 less.
Light can’t pass through walls. It flows along open paths and can turn corners, so a cell behind a wall gets less light, or none.
When light from two or more sources reaches the same cell, the numbers add together. The small numbers show the total light in each cell.
Clue cells have a number in the top-left corner. It must equal the light in that cell. The badge is blue when the light is too low, coral when too high, green when exact.
You win when every clue is green and you used exactly all your sources. Then press Next level. Clear sources removes all of them at once.