Lumen
Route coloured light into the receivers.
How it's built
- Pure beam tracer, unit-tested in Node
- Solver stores a minimal solution per level
- Daily puzzle proven solvable before shown
- Colour-blind-safe pips on every receiver
A light-routing puzzle: place mirrors, splitters, filters and prisms so every receiver gets exactly its colour. Beams add up (red + blue = magenta). 30 levels in six chapters, a daily puzzle with share card and streak, hints, undo/redo, star ratings, colour-blind-safe pips, keyboard, touch and mouse play, light and dark themes. No account, no ads.