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Go / No-Go
Reflex & Reaction Time
Tap when the circle is GREEN. Hold when it’s RED. Inhibition under speed across 20 trials.
Save your scores
Sign in to save scores and climb the leaderboard. We store your name & email only, and show your name only.
Or just play — anonymous scores show on screen but aren’t saved.
Leaderboard
No scores yet — sign in and set the first one.