Don't Blink is a minimalist reaction time game built around one simple question: how fast are you, really? No guessing, no luck — just you, a color change, and a clock counting in milliseconds.
The premise is simple. A solid color fills your screen. At a random moment it changes. Click the instant you see it. Your reaction time is measured to the millisecond. Complete five rounds and get your average — that's your score.
The average person reacts to a visual stimulus in around 250 milliseconds — about a quarter of a second. Elite esports players typically clock in around 200ms. Reaction times below 150ms are physiologically unusual and often the result of anticipating rather than reacting.
Reaction time isn't fixed — it changes depending on a range of factors:
To stop you from clicking on reflex alone, some rounds include a brief fake flash — a subtle shift in the background color that quickly reverts. If you click during a fake, the round resets. Only a genuine color change counts. This is what separates true reaction time from simple anticipation.
The global leaderboard tracks the top 100 scores. Rankings use standard competition scoring — if two players tie, they share the rank and the next position is skipped. Enter your name after a game to claim your spot.
Don't Blink is built with plain HTML, CSS, and JavaScript — no frameworks, no dependencies. Leaderboard data is stored in Firebase Firestore. The game runs entirely in your browser.