A beat plays. Markers on the ring show where the notes fall. Tap anywhere (or press Space) exactly on each note. Levels climb from plain quarter notes to sixteenths and triplets, and the tempo rises with them.
Headphones or speakers add delay between the sound and your tap. Run calibration once and the game corrects for it.
Twelve clicks are coming. Tap along with every click, as naturally as you can. The game measures how late your taps land and subtracts that from now on.
Tap Start, then tap with the clicks.