Play · Mobile Puzzle
Lumen
Chess puzzles, but every solution is a chain reaction of light you set off with one drag. Solver-proven boards, one thumb, an Elo ladder that never ends.
import { runBrowser } from 'hayao'
This isn't a video — it's the engine running the real game on this page. Drag a spark from the tray; light every prism before the clock runs out.
Rated like chess puzzles
Every board carries a difficulty rating and you carry one too. A 60-second clock, and an Elo that moves with each result — the stream never ends and always fits you.
One-thumb chain-fire
Drag a spark onto a lattice of directional prisms. It fires a chain reaction of light — and a live preview shows the whole cascade before you commit.
Every board machine-proven
No board ships unless the solver proves it winnable in its exact spark budget. Deterministic, seeded, and endlessly generated — never hand-drawn.
Designed, then proven
Composed from a mechanic, verified before it shipped
Lumen was designed with the Hayao Design Codex — an anchor, a genre, and one twist — then built in the default Regalia style. Its rules are a pure module the solver can prove, so every generated board is winnable and the whole game replays deterministically.