BOP

BOP is a one-button rhythm game. A dot drops toward the line on the beat and you tap (or hit Space) exactly when it lands. That's the whole game: no menus, no tutorial, no account. One run is 20 seconds. At the end you get a score and one button: AGAIN. Built to be understood in three seconds and replayed in ten, on desktop or phone. Free, no ads, plays in any modern browser.