Reaction Time

Reaction Time is a browser-based reflex game that measures how quickly you respond to a visual GO signal. Each round gives you five attempts to record your fastest reaction time in milliseconds. The play area waits a random delay, then flashes green and the clock runs until you click, tap, or press a key. The game penalizes early clicks with a false start warning and a small time penalty so you learn patience and focus. After five attempts you see every individual time, your average, your best time, and a rank badge from Slow to Godlike. Your best score saves automatically so you can track improvement across sessions. Reaction Time works with mouse, touch, or keyboard and includes subtle sound feedback for every event. The clean neon interface keeps distractions low so each attempt feels fair and repeatable. No account, no ads, no setup — just open and test your reflexes.