Cogglow: Gear Puzzle

Drop glowing gears onto pegs until the motor’s spin reaches every lamp. No timer, no lives, no fail state – just a few calm minutes and the click of teeth catching. The rules come from the picture: gears that touch turn the other way, so the length of a chain decides which way a lamp spins, and a bigger gear reaches further. Drag a gear from the tray onto a peg and watch the spin travel tooth by tooth until the glass domes fill with light. More gears than needed still work; the fewest earn three stars. • 60 levels in three halls: Brass teaches meshing, direction and bolts; Neon brings two coloured motors whose trains must never touch; Chrome has motors that must agree • Every level is checked by a solver: there is always exactly one shortest way • Gear of the Day: a new board every day, the same for everyone, with a streak, streak freezes and a share card • Stuck? A hint lights one peg…