Reaction Time

Measure how fast you react. Click when the screen turns green.

1. Click or tap the box as soon as it turns green. The game measures your reaction time in milliseconds.
2. Each round starts on Wait… and the box turns green at a random moment, so don't try to guess the timing.
3. Click too early and you'll see Too soon: that round doesn't count, and one more click lets you retry it.
4. There are 5 rounds, and you move on with Next round whenever you're ready. At the end you'll see your best time, your average and each round's time.
5. Your time is taken when you release the click or lift your finger, not when you press down, so keep each tap short and sharp.