A bright little brain teaser

Afterglow

Find a little order in the glow.

Growing your first board…
Your progress stays in this browser.Take a break. Come back tomorrow.
How to play

Afterglow

  1. Tap a light to toggle it and its immediate neighbors above, below, left, and right.
  2. Turn all sixteen lights off to solve the board. Every puzzle has a solution.
  3. Solve level one to complete today’s challenge. Keep going: each new level needs a longer minimum solution.
  4. Hints highlight one useful next tap. Restart resets the current level.

Keyboard: use arrow keys to move between tiles. Enter or Space plays a tile. Daily boards reset at midnight UTC.