How long is the sequence at round N?

Exactly N colours — the game always replays the entire sequence from the start, then adds one new colour at the end. There is no separate "buffer" you only have to remember the most recent few.

What is a good round to reach?

Reaching round 10 is a solid result for most players. Round 15 puts you above average; round 20 starts to bump into the limits of human short-term memory.

Can I use the keyboard?

Yes. Q triggers Green, W triggers Red, A triggers Yellow, S triggers Blue. Keyboard input is often faster than clicking once the sequence gets long.

Is the sequence random or is there a pattern?

Each new colour is picked uniformly at random from the four pads, so no pattern repeats between sessions. Strategies that look for hidden structure will not help — only memory does.

Does the game speed up?

No, the playback tempo is fixed in this version so the only thing that scales is sequence length. That keeps practice fair between runs.

Yes. Free, no signup, runs entirely in your browser.

Simon Says

Memorise the colour sequence and repeat it back as the pattern grows each round.

Written by Golam Rabbani, Founder & Lead Engineer

This interactive tool requires JavaScript. Read the formula and worked example below; you can compute the result by hand.

Round: 0Best: 0

Keys: Green = Q, Red = W, Yellow = A, Blue = S. Watch the sequence, then repeat it.

How to use this simon says

Press Start to begin; a single coloured pad will flash.
Repeat the sequence by clicking the same pad (or pressing its keyboard shortcut: Q, W, A, S).
Each successful round adds one more colour to the end of the sequence.
Make a mistake and the game ends; your round count and session best appear in the result panel.
Press Reset to wipe progress and start fresh.

About this simon says

Simon Says is a memory game in the lineage of the 1978 Milton Bradley electronic toy: the computer plays an ever-growing sequence of coloured pads, and you have to repeat it back exactly. Round 1 is one colour, round 2 adds a second, and so on — the recall load grows linearly while the time pressure stays constant.

The game distinguishes two phases that you can see in the UI. While the computer is "showing" the sequence the pads are non-interactive, so accidental clicks do not count. Once playback ends the input phase starts, and any wrong pad ends the run immediately. Both mouse and keyboard work — Q lights the green pad, W lights red, A lights yellow, S lights blue — which is handy for fast inputs and for users who prefer keyboard navigation.

For example, round 7 might play Green, Red, Yellow, Yellow, Blue, Green, Red. You repeat it correctly, the game adds an eighth colour, and the next round plays the same seven plus a new one on the end. Most players hit a wall somewhere between rounds 8 and 15, where human working memory caps out. Chunking colours into groups of three or four (the way you read a phone number) is the standard trick for pushing past that ceiling.

FAQ

How long is the sequence at round N?: Exactly N colours — the game always replays the entire sequence from the start, then adds one new colour at the end. There is no separate "buffer" you only have to remember the most recent few.
What is a good round to reach?: Reaching round 10 is a solid result for most players. Round 15 puts you above average; round 20 starts to bump into the limits of human short-term memory.
Can I use the keyboard?: Yes. Q triggers Green, W triggers Red, A triggers Yellow, S triggers Blue. Keyboard input is often faster than clicking once the sequence gets long.
Is the sequence random or is there a pattern?: Each new colour is picked uniformly at random from the four pads, so no pattern repeats between sessions. Strategies that look for hidden structure will not help — only memory does.
Does the game speed up?: No, the playback tempo is fixed in this version so the only thing that scales is sequence length. That keeps practice fair between runs.
Is the game free?: Yes. Free, no signup, runs entirely in your browser.