Choose a paced sequence. Playback temporarily controls the board and restores your puzzle when it ends or is exited.
Demonstration mode uses a relaxed pace of about 1.1 seconds per move and returns to the puzzle opening state when exited.
Replaying the optimal solution will mark this attempt as solution-assisted. Your current puzzle state will be restored when playback ends.
A luminous three-dimensional logic puzzle
Turn every light off by activating cells across synchronized level boards and a rotatable cube representation.
Turn all lights off. A move toggles its selected cell and every valid orthogonal neighbor: left, right, above, below, level above, and level below.
Click a level-board cell. Hover previews the complete affected neighborhood across all synchronized boards.
←/→ column, ↑/↓ row, PgUp/PgDn level, and Enter or Space toggles.
Hover a 3D light to preview its complete orthogonal neighborhood. Click or tap without dragging to activate it; drag with one pointer to rotate, pinch with two fingers or use the wheel to zoom, choose a camera preset, and switch projection modes.
Use the Theme button to cycle through Modern Blue, Classic Console Green, Light Grayscale, and Colorful. Sound and glow remain optional, and Reduced Motion limits animated effects.
Every light reports its level, row, column, and on/off state. Focus is shown with a high-contrast cursor, modal focus is contained, and all puzzle actions are available from the keyboard.
Your active puzzle, moves, timer, preferences, best scores, and recent completions are saved locally. Daily Puzzle uses the date as a reproducible seed. Limited Moves and Timed modes end when their allowance is exhausted.
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