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Simon Says

Watch the sequence and repeat it. How long can you remember?

Medium

Level

Best

Press Start to play

About Simon Says

Simon began as a 1978 electronic toy from Milton Bradley, created by Ralph Baer and Howard Morrison, and it became an icon of early gaming: four glowing coloured pads, one growing sequence, and your memory as the only controller. Psychologists recognise the challenge as a pure test of working memory — most adults can hold about seven items in mind, which is exactly where Simon starts to bite.

This version keeps the formula strict and clean. Four pads — red, blue, green and yellow — flash one colour per round at a steady pace, and each cleared round appends one more colour to the sequence. During playback the pads light every 700 milliseconds; during your turn a single wrong press ends the game immediately (there is no forgiving "strict mode" toggle — strict is the game). Your score is the level you reached, the game tells you the sequence you missed, and your best level of the session is kept.

How to Play Simon Says

Press Start Game. One pad flashes — that is step one of the sequence.

Wait until the playback finishes and the message says it is your turn, then click the same pad.

Each round the full sequence replays from the beginning, one step longer than before. Repeat the entire sequence in order.

One wrong pad ends the game on the spot. The panel shows the level you reached and the correct sequence.

Press Restart to try again and chase your session best level.

Controls

Click / Tap a coloured padEnter that colour as the next step of the sequence

Start Game / RestartBegin a new game with a fresh one-step sequence

Tips & Tricks

💡Give the colours a voice: silently naming "red, blue, blue, green" as they flash engages verbal memory on top of visual memory and roughly doubles what most people can hold.
💡Chunk the sequence into groups of three or four, the way you would a phone number — level 12 is not twelve items, it is three groups of four.
💡Watch the whole board rather than following each flash with your eyes; peripheral encoding of position is faster and interferes less with the verbal rehearsal.
💡Keep a rhythm when repeating back. Hesitating mid-sequence to "think" usually scrambles the chunk boundaries — if you know the chunks, trust them at a steady tempo.

Simon Says — Frequently Asked Questions

How is the score worked out?+

Your score is the level you reached, which equals the length of the sequence you were attempting. Completing level 9 and failing on level 10 is recorded as reaching level 10, and your best level of the session is displayed next to it.

What happens if I press the wrong pad?+

The game ends immediately — this version is always strict. The correct sequence is displayed as pad numbers so you can see where you went wrong, and Restart begins a brand-new sequence.

Does the sequence speed up?+

No. Playback stays at a constant rhythm — one flash every 700 ms — no matter how long the sequence grows. The difficulty is purely the length of what you must remember.

What is a good level to reach?+

Working-memory research suggests most adults stall between levels 7 and 9 without a strategy. With chunking and naming the colours, levels 12–15 are realistic targets.