60 seconds

A key on the board lights up. You press it. The game times you in milliseconds, three rounds in a row, and finishes by painting the whole keyboard with how fast you found each key.

How to play Key Reflex

  1. Wait for a key to light up, then press it as fast as you can.
  2. Wrong key: +250 ms and the light stays. Pressing before the light is a false start.
  3. Round 1 is the home row, round 2 adds the top row, round 3 is the whole board with numbers.
  4. In round 3 some targets are pairs: two keys light in order, hit both.

How it works

Each run has three rounds of fifteen targets. After a random pause somewhere between a third of a second and almost a second, one key rises out of the board and starts to glow. Press it and the cap clicks down, light runs out across the neighbouring keys and your time pops up above it. The pause is random on purpose, so you cannot fall into a rhythm and press on the beat. If you jump the gun and press before the light, that is a false start and the wait begins again.

Three rounds, a wider board each time

  • Round 1, home row. A to L only. This is where your fingers already live, so it is the warm-up.
  • Round 2, top row joins. Q to P come in, and now some targets need a reach.
  • Round 3, the whole board. Bottom row and numbers join, and some targets are pairs: two keys light up in order and you hit both, like a tiny word.

What the numbers mean

Your score is the average time per key in milliseconds, so lower is better. A wrong key adds 250 ms to that target and the light stays on until you find the right one, which means guessing never pays. Most people land somewhere between 300 and 450 ms on their first run. Under 250 ms is very quick.

When the last target goes, the keyboard turns into a heatmap: green keys are the ones you found fast, red ones slowed you down. The results card names your slowest keys. Those are usually the ones furthest from the home row, and they are the ones worth practising.

Why train reaction time on a keyboard?

Typing speed is mostly about not hunting for keys. A reaction drill like this one shows you exactly which keys you still have to look for, in a minute, without reading a whole paragraph. Play Advanced if Standard feels easy: shorter pauses, twenty targets a round and the number row arrives in round 2.

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Questions people ask

What is a good keyboard reaction time?

Around 300 to 400 ms per key is typical for a first run. Under 250 ms is fast, and the best players settle around 200 ms on the home row.

Why did my time go up when I pressed the wrong key?

Every wrong key adds a 250 ms penalty to that target and the light stays on, so a careful press is almost always quicker than a fast guess.

How are the pairs in round 3 timed?

The first key is timed from the light. The second key is timed from your first press, so reading ahead and flowing into the second key pays off.

Does it work on a phone?

Yes. The board zooms in on the letter and number keys on a narrow screen, and the on-screen keyboard works for input, though a physical keyboard gives truer times.

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