MONO

MONO is a minimalist Lights Out puzzle. Study the target, flip cells on the board, and make them match — every click counts.

Choose a grid size from 3×3 to 6×6, then work through 100 levels with hints, undo, and reset. Dark chamber, soft gold accents, no clutter.

Features

• 4 grid sizes: 3×3, 4×4, 5×5, 6×6
• 100 levels per size
• Hint, Undo, Reset
• Play in the browser — desktop & mobile

match. flip. clear.