Blink is a straightforward reaction-time test dressed up as a game: targets appear on screen at unpredictable moments, and you need to click them as quickly and precisely as possible without jumping the gun and clicking before they show up. It's the kind of game that's easy to explain in a sentence but genuinely difficult to top your own best score at.

Because the targets appear at random intervals rather than a fixed rhythm, you can't simply memorize timing — the test stays honest to actual reaction speed and precision rather than pattern memorization. It's a good quick benchmark to revisit occasionally and see whether your reflexes have gotten sharper (or slower) since the last time you played.