6×6 · Puzzle & Thinky on ArcadeOwl
Tap a tile to flip it and its four orthogonal neighbours on or off.
Every lit tile must be switched off to win.
Pressing the same tile twice returns it to its original state.
Work row by row, then clean up the bottom line.
✦ Always-solvable scrambles
✦ Tap-count scoring for efficiency
✦ Glowing, tactile light feedback