Set up
- Lay the phone flat between the players.
- Each player rests a finger near their own side of the screen, without touching it.
How to play
- Every zone shows a red WAIT.
- After a random wait of 1.5 to 5 seconds, all zones turn green at the same time.
- Tap your zone as soon as it turns green. The fastest tap scores the point.
- Tap while it is still red and you lose that point.
- The app shows each time in milliseconds. First to 3 points wins.
Tips to win
- Watch the colour, not your friends. People flinch on purpose.
- Keep your finger a few millimetres above the glass.
- The wait is random every time, so do not try to count it.