LumiHinge: Fold Puzzle

LumiHinge turns a small crystal board into a puzzle of space and orientation. Four crossing hinges change where the crystals sit and which side they show. One fold can help a crystal while unsettling another. The order of your folds matters.

YOUR GOAL
Return the six numbered crystals to their sockets. In Discovery, match their positions. In Duality, match both positions and the sun faces. Moon faces are marked with a different symbol, so colour is never the only clue.

FOUR FOLDS
A reflects the left square sideways. B reflects the right square vertically. C reflects the top row; D reflects the bottom row. In Duality, each affected crystal also flips over, including the middle crystal in a row fold. Repeating the same fold reverses it. Combining different folds is where the challenge begins.

A JOURNEY OF 240 PUZZLES
40 Discovery levels teach the spatial rules, followed by 200 Duality challenges. Every level is available from the beginning. Puzzle difficulty comes from the minimum number of folds, not a time limit.

A DAILY CHALLENGE
A deterministic daily puzzle changes at midnight UTC. Results and a daily streak stay on your device.

THINK AT YOUR OWN PACE
• No timer, lives or in-app purchases.
• Free undo, reset and hints.
• Hints highlight a shortest-path fold; tap again to use it.
• Compare your folds with the exact optimum and earn stars.
• Crystal flipping animations with an option to reduce motion.
• English and Romanian, with a saved language preference.
• Keyboard controls A/B/C/D or 1/2/3/4, H for hint, Z for undo.
• Accessible labelled controls and numbered symbols.

The game works offline. Google AdMob supplies an adaptive banner in a separate area below the game. Hints and levels never require watching an ad. Protective advertising settings apply to every player. Local progress is not sent to the developer; Google advertising services may process technical data described in the privacy policy.

Designed for readers aged 9 and older. No account, chat or user-generated content.