Guide the Player to the gate and out. The gate only opens when the Light Board matches the gate's pattern exactly.
Every tile on the board is colored: Gray, Red, Yellow, Blue, plus optional Green and Orange. There's a shared Light Board in the control bar with one light per active color.
Whenever the Player moves onto a colored tile, that color's light flips — on becomes off, off becomes on. Gray tiles never flip anything.
Two special tiles affect every light at once: a Black tile switches every light OFF, and a White tile switches every light ON — both replace the Light Board's whole state rather than flipping just one color.
The gate shows its own light pattern as a line of pips — lit means that color must be ON, dim means it must be OFF. The gate only opens when the current Light Board matches its pattern exactly. Walk through a matching gate and you escape.
The gate is drawn as a wider box so its whole light pattern is easy to read at a glance, but there's only one actual entry point into it — look for the single break in the white wall tracing the board's edge. The rest of the box is just display space, not a place you can walk through.
A Wall is a line drawn on the border between two tiles, not a tile itself — it blocks crossing between those two specific tiles. A White Wall always blocks, no way through. A colored Wall only blocks while that color's light is off — cross it once that light is on.
Keyboard: Arrow keys to move. Backspace, Delete, or Z to undo.
Touch/mouse: Swipe or drag on the board to move. Swiping back the way you came — which would otherwise just bounce — undoes that move instead.
Reset needs a second tap within a few seconds to confirm, so you don't lose progress by mistake.
You can't re-cross a step you've already taken for the rest of that puzzle — you'll need to route around instead. Undo replays your full move history one step at a time. Bumping into something — the board's edge, a closed or mismatched gate, or a Wall — doesn't use up a move.
Set your own grid size (4×4 to 8×8). Which lights are in play is picked for you from your chosen difficulty — usually 3 (Red/Yellow/Blue) for Easy, 4 (adding Green) for Medium, and 5 (adding Orange) for Hard, though it varies sometimes for a bit of extra variety.
Difficulty (Easy/Medium/Hard) is a target, not a fixed layout — it's based on how many moves the shortest solution takes and how forced each step is, so a small board can come out Hard and a big one can come out Easy. The generator retries a few times to land close to your chosen difficulty. Black, White tiles and Walls (including colored ones) can turn up at any size, and every generated puzzle needs at least a few moves to solve.
Every generated board is also carved into a handful of rooms, each pair connected by a colored-Wall doorway. The Player spawns in whichever room is farthest from the gate, and escaping means making your way from room to room, roughly in order, toggling each doorway's color along the way. Not every room sits on that route — some are dead-end space you're free to explore or skip.
Daily: everyone gets the same puzzle each day, targeting Medium difficulty on a size/color mix that varies day to day — solve it and share your result.
Level Maker: paint your own grid at any size — including Black and White tiles, plus Walls (White or any active color) placed on any cell border — place gates and set their light patterns in a full-size editor, then use Check Solvability for a real verdict (solvable, unsolvable, or inconclusive if it's too complex to check quickly) before sharing a link to your puzzle.
Choose your puzzle's size and palette, then start painting.
Click cells to paint. Place the Player start. Click a border slot to add or edit a gate.
Tap each color to set whether its light must be ON or OFF for this gate to open.