Clockwork

Turn the rings. Line up the colours. Mind the cogs.

Rings sit inside each other with gems on their notches. Turn them until a spoke, the same notch on every ring, lines up in one colour, and it clears. Clear every gem to win.

Cogs link the rings. Turn the outer ring and the inner one turns twice as far the other way; turn the inner ring and the outer one turns back. Cogs chain, so one turn can move every ring.

Padlocks. A padlocked ring won't turn by hand. Turn its neighbour and let the cog do it.

40 levels in four chapters, each bringing one new idea. No timer and no fail: stars for the fewest moves, a hint whenever you want one, and restart is free.

Best on a phone, in portrait. Tap a ring to turn it a notch, or drag it either way.

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About this project. Clockwork is a design portfolio piece by Umut Eren Demirci. Every level's best line is found by a solver, and the rules and the difficulty curve were changed by what playtests showed; the design documents are at umuterendemirci.github.io. Built in Unity with an AI coding assistant (Claude): I designed the game, set the rules, the chapter plan and the tuning, and reviewed every build. There are no ads or purchases.

Credits. Art: Mini Casual UI Kit by Butabi. Sounds and pointer: Kenney (kenney.nl, CC0). Font: Montserrat (SIL Open Font License).