Color pattern memory game with audio feedback. Repeat the sequence as it gets longer. Three speed settings
Watch the sequence of colors light up, then repeat it back from memory. Each round adds one more step. Simon Says starts easy but quickly becomes a serious test of short-term memory and focus.
Initializing in your browser…
Card matching memory game with 4 emoji themes (animals, food, sports, nature), 3 difficulty levels, and timer
Code-breaking puzzle game. Guess the secret color code with feedback pegs. Three difficulty levels
Classic cellular automaton simulation. Draw cells, load famous patterns (Glider, Pulsar, Gosper Gun), and watch complex behavior emerge from simple rules.
The sequence so far is green, red, red and the game adds one more flash.
Input
Reproduce: green → red → red → (new) blue
Result
Correct → round 5 begins with a 5-step sequence
Each round appends one step to the existing pattern, so it tests working memory under growing load. Chunking the sequence into groups of 3–4 and rehearsing sub-groups is how players push well past the ~7-item short-term limit.
Watch the sequence of colors light up, then repeat it back from memory. Each round adds one more step. Simon Says starts easy but quickly becomes a serious test of short-term memory and focus.
Actively recalling growing sequences is one of the best exercises for working memory.
The distinct tones for each color help develop auditory pattern recognition.
Pass the device around and see who can survive the longest sequence.
The board demonstrates the pattern, but you must tap it back in the opposite order; both the demo playback and the answer check run against the reversed sequence.
Starts at a 300ms flash and multiplies the interval by 0.88 each round, accelerating toward the 150ms minimum so the pattern plays back almost instantly within a few rounds.
This Simon Says memory game generates a growing color sequence on a four-pad board and challenges you to repeat it. Beyond the classic format, it offers four distinct game modes: Classic (standard repeat), Reverse (you must enter the sequence backwards, and even the demonstration flashes in reverse), Speed Up (the flash interval shrinks by a per-round speed-decay factor down to a floor of 150ms), and Chaos (the entire sequence is randomly regenerated each round rather than appending one new color). Four difficulty levels set the base flash speed and decay: Easy (900ms, 0.98 decay), Normal (650ms, 0.95), Hard (450ms, 0.92), and Expert (300ms, 0.88), so on Expert the pattern plays back nearly three times faster than on Easy.
Sounds are synthesized live with the Web Audio API rather than loaded as audio files: each pad is an oscillator tone at a fixed frequency (329.63, 261.63, 392.00, and 523.25 Hz across the four pads), played as a sine wave with an exponential gain ramp; completing a round triggers a three-note arpeggio at 523.25/659.25/783.99 Hz, while a wrong tap plays a 100Hz sawtooth error buzz. You can play with the mouse or the keyboard, with the Q, W, A, and S keys mapped to the top-left, top-right, bottom-left, and bottom-right pads. Two single-use power-ups per game help on tough rounds: Slow-Mo stretches each flash to 1.5x its normal length, and Preview replays the full sequence again on demand.
The game ships with four visual themes (Classic, Neon, Pastel, Dark) that recolor the pads and glow effects while keeping the same tone frequencies. Progress persists in your browser via localStorage (keys like simon-mode, simon-difficulty, simon-theme, simon-sound, and simon-stats), tracking games played, total rounds, longest streak, power-ups used, and best scores recorded separately for every mode-and-difficulty combination. Seven unlockable achievements gate on those stats, including reaching scores of 10 and 25, playing 10 and 50 games, and hitting a 10-round streak, with an on-screen notification when one unlocks.
There is no upper limit, the sequence keeps growing until you make a mistake.
The game ends and your streak is recorded. Hit play to try again.
The game runs entirely in your browser. No account is needed and no gameplay data is collected.