Prism - Daily Light Puzzle

A dark box. A single beam of light. A handful of mirrors floating in space.

Turn the mirrors until every crystal is lit.

That is the whole game, and it takes about fifteen seconds to understand. What makes it hard is that the light is one continuous path — move a single mirror and everything downstream of it moves too. You cannot solve Prism one piece at a time.

★ ONE PUZZLE A DAY
Everybody gets the same puzzle on the same day. It arrives at midnight, it takes about two minutes, and when you have solved it you are done. No energy bar, no countdown, nothing asking you to come back in four hours.

★ GENUINELY THREE-DIMENSIONAL
The beam does not stay flat. A mirror bounces it out of its current plane and into another part of the box, so you have to think in three dimensions — and you can rotate the whole box with a finger to see where the light actually went.

★ A REASON TO COME BACK
Solve on consecutive days and your streak grows. Compare your score with everyone else who played today. Share your result as a spoiler-free grid that gives nothing away about the puzzle.

★ WHEN YOU WANT MORE
• The archive holds every past day — more than five hundred puzzles and growing
• Practice mode is endless, at any difficulty, with no streak at stake
• Coins earned by solving unlock themes that repaint the whole scene

★ BUILT PROPERLY
• No purchases of any kind. Nothing is locked behind money.
• Plays completely offline — the daily puzzle is generated on your device.
• Colour-blind mode that changes shapes and outlines, not just hues. Every element is identifiable by silhouette alone.
• Reduce-motion support, and haptics you can turn off.

Monday is gentle. Saturday is not.

Recent changes:
The campaign is here: 500 levels, in order, getting harder.

From level 41, some mirrors are decoys. They look exactly like the ones that matter and change nothing. Working out which is which is the puzzle now.

Also new: six campaign achievements, a skip for levels that beat you, and streak freezes.

Levels pay coins now, so the shop has been repriced to match. Everything you own stays yours.

Your daily puzzle is still here, unchanged.