HOW TO PLAY
Glow Grid
Some cells are glowing. Tap any cell and it flips between lit and dark, and so do the cells directly above, below, left and right of it. Your goal is to turn every light off.
Every level can be solved, and the order of your taps never matters, only which cells you tap. Tapping the same cell twice cancels out, so use Undo freely. Par is the number of taps the level was built from; you may find a shorter way.
Boards grow from 3 by 3 to 6 by 6 across 24 levels. Hint marks one cell that is still part of a solution. Lit cells also show a solid centre, so you never need to tell colours apart. With a keyboard press Tab to a cell and Enter to tap, U to undo, R to restart and H for a hint. Your best move count per level is remembered on this device only.