Colour pattern memory game with audio feedback. Repeat the sequence as it grows. Four modes, four speeds, flash and gap times printed
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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, and the page says which of its four modes grows the pattern and which replaces it. Chunking the sequence into groups of three or four and rehearsing sub-groups is how players push well past the seven-item short-term limit. The flash time and the dark gap between flashes are both printed, because the gap is what lets you see two of the same colour in a row as two presses rather than one long one.
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 180ms, which keeps a flash a person can see), 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 step is split into an on time and a dark gap in a fixed proportion, both printed on the page, because the gap is what lets you see two of the same colour in a row as two presses rather than one long one.
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.
It grows in Classic, Reverse and Speed Up: round n is round n-1 with one colour added, so everything you learned last round is still true. Chaos deals a brand new pattern each round, one colour longer, and the page says which of the two the current mode does.
Reaching round 10 without a wrong press.
The game runs entirely in your browser. No account is needed and no gameplay data is collected.