Test your reactions

1. Click or tap the game area to start.
2. Wait while the five red lights come on.
3. As soon as all the lights go out, click or tap the game area again.
4. Your reaction time is measured in milliseconds.

You can also use Space or Enter if you are using computer. Your best score is stored locally in this browser. No account is required.

1. Click or tap the game area to start.
2. One light will turn on.
3. Hit the illuminated light as quickly as possible.
4. Repeat until all seven lights have been hit.
5. Your total and average reaction time will be shown.

Your best score is stored locally in this browser. No account is required.