Touch: tap the on-screen keys to spell a guess, then the return-arrow key to signal it and the back key to erase; in Beacon tap a colour swatch to drop it on the next lamp, tap a placed lamp to remove it, then Clear or Signal; buttons along the top open mute, help and the menu · Keyboard: type letters and press Enter to submit, Backspace to erase; in Beacon press 1-6 to place a colour and Backspace to remove; the on-screen keys, swatches and buttons also work with the mouse
About:
A codebreaker made in-house for Leetdom, in the spirit of the 2000s Flash word puzzles. Every lamp, tile, beam and star is drawn in code; there are no outside assets, fonts or network calls.
Signal is the word game: you have six guesses to find the keeper's five-letter signal word. Each guess lights every tile — a gold lamp means the letter is in the right place, an amber glow means it is in the word but somewhere else, and a dark slate lamp means it is not in the word at all. Duplicate letters are scored honestly, so a repeated letter only glows as many times as it really appears. Guesses must be real words from a curated list, and every answer has been checked solvable within six guesses by a built-in solver.
Beacon is the colour game: the keeper hides a code of four lamps drawn from six colours, and you have ten tries to break it. After each row you are told how many lamps are the right colour in the right place and how many are the right colour in the wrong place — no hint of which is which. Every one of the 1,296 codes has been proven breakable within the limit.
Play the shared Daily, an Endless run of fresh puzzles, or type a Seed to replay or share an exact board with a friend. Colour cues can be turned on so every lamp also carries a shape, so the board reads without relying on colour. Your games, win rate, streak and guess spread are kept per mode on your device, and when you win you get a spoiler-free grid of lamps to share.
Credits:
Made by Leetdom, 2026. Written for Leetdom, and it lives here.
Phone check: 2026-10-05: real CDP input on a 390x844 phone, a 1280x800 desktop and an 844x390 landscape phone. Portrait Signal: a seeded board, opener typed by tapping the on-screen keys, a guess committed and revealed with per-tile lamp feedback, and typing the answer shows the win panel; Next signal gives a fresh board in one tap. Desktop Signal: six wrong but valid guesses typed on the keyboard end in a loss, and one key retries. Landscape Beacon: colour swatches place the exact four-lamp code by touch and win with four lit pegs; a hidden tab pauses the loop. localStorage blocked by a throwing getter still boots to the menu and plays through. Audio measured through an OfflineAudioContext driving the live synth: full-mix peak -9.95 dBFS (no clipping, soft-clip ceiling held), ambient music -11.7 dB under the sfx and peaking at -17.1 dBFS, a clean silent noise floor, and windowed-RMS CoV 1.60 confirming the music phrases rather than drones. Zero console errors on every viewport and no off-origin requests (5 requests, all local). Core suite: all 822 answer words solved within six guesses (avg 3.18) and all 1,296 colour codes broken within ten (avg 5.02, worst 8); feedback correctness including duplicate letters and determinism of seeded puzzles asserted.
Rate this game:
One vote per game each month.
Play next:
Daily PuzzleA new small logic puzzle every day, and a different kind of puzzle for each day of the week.
Star ChartRestore a monastery's faded star-chart by setting glyphs so every row, every column and every 3x3 ward holds all nine marks exactly once. Four graded difficulties, a fresh daily chart, pencil marks, undo and a hint — made to be played equally well by thumb or by keyboard.
Word SpinSix scrambled letter-spools sit on a little loom. Spin them into as many real words as you can before the thread runs out, clear each round's quota to climb, and chase the bonus spin and the full weave. Read what every word you wove actually means between rounds.
0h h1Fill the grid with red and blue: no three in a row, equal counts per line, no two lines alike.
