How to play
Wait until the panel turns green and says NOW, then react as quickly as you can. Five valid reactions complete a round and reveal your average time. Tapping early is a false start and does not count toward the five attempts.
Your reaction is recorded as soon as you press the primary mouse button, touch the panel, or press Space or Enter; you do not need to release it. Keyboard input requires the panel to have focus. After a result appears, press again to start the next attempt.
P or Escape pauses and resumes. Pausing cancels the unfinished wait; resuming starts a new signal while keeping completed results. Clicking outside the game or switching windows pauses automatically.