About this game
Tap the instant the carton turns green, a 5-round reaction-speed test!
What this game is
Tap the instant the screen turns green. That is all there is, and you do it five times. The amber screen is the waiting phase, and because the wait is a different length every round you cannot get ahead of it.
The gap between your eye catching the colour and your finger landing shows up in milliseconds, exactly as it was. One lucky round proves nothing, but the average is hard to fool, and a bad night's sleep shows up in it straight away.
How to play
- Green means tap
- Amber is the wait; the clock starts the moment the screen flips to green. Any spot on the screen counts, so there is no aiming to do.
- Jump the gun and the round restarts
- Press before the green and you get a too-soon screen, then the round starts again with a fresh wait. Guessing never produces a good time.
- The average comes after all five
- Each round shows its own milliseconds immediately, and once all five are done you get the average plus a one-line grade. The faster you react, the higher the score.
- Half of it is how you wait
- Hovering your finger a hair above the glass shaves real time off. Just do not let it touch before the green, or the round is gone.
Frequently asked questions
- What if I tap too early?
- That round is not recorded and the wait begins again. The delay is random every time, so there is no timing to memorise.
- How is the score worked out?
- The faster your reactions, the higher the score. On screen you get the averaged milliseconds and a one-line grade together.
- Does it cost anything?
- It is free. One Google sign-in and you can start measuring.
- Does it work on a phone?
- It opens straight in a phone, tablet or desktop browser. A mouse click works on a desktop, though times can differ a little from device to device.
