Cœur de Cristal

200 optical puzzles whose difficulty climbs and never dips. No ads, no in-app purchases, no connection.

Guide the light to the heart of the crystal.

Sources cast coloured beams across a silent grid. Tilt the mirrors and tune the prisms so that every colour reaches the heart that calls for it. A contemplative optical puzzle: no timer, no lives, no pressure. Just light, geometry, and all the time you need.

200 LEVELS, 20 ACTS

A campaign that climbs and never dips. Every level is measured across seven dimensions — optimal move count, rarity of the solution, depth of the light path, density of mechanics, decoys — then ordered by strictly increasing complexity. Level 47 is harder than level 46. Always. No plateaus, no slumps.

TWELVE MECHANICS THAT COMBINE

• Mirrors you flip between two diagonals • Prisms that tint the beam in passing • Splitters that double the light • Paired portals that teleport it • Additive fusion: red and green make yellow, all three make white • A spectral prism that breaks white back into its spectrum • Chromatic gates that admit a single colour • Sensors and linked gates, obsidian that blocks everything

The early acts introduce each piece one at a time. The last ones fit them all onto the same grid.

THREE MUSICAL MOODS

Aurore, warm. Boréale, for the night journey. Cristal, a music box. Composed layers, seamlessly looped, chosen from the title screen.

THREE STARS

Three for the optimal solution. Two if you come close. One for reaching the end — which already counts. 600 stars to gather.

ENGLISH AND FRENCH

The game follows your device's language and can be switched at any time from the title screen. Interface and level hints are both fully translated.

WHAT IT DOESN'T HAVE

No ads. No in-app purchases. No account. No connection required. The whole game is there from first launch, and your progress never leaves your device.