

Here we have a slider.
First, you have to hit it at the right moment, but it doesn't end there.
A ball will start to move across the path you see.
You have to hold the mouse/keyboard-button (or your finger/pen on the tablet) and keep your pointer inside the thick orange circle surrounding the ball as it moves.
You cannot control the movement, and you must follow its movement.
The orange circle will appear if you are holding it and disappears when you leave it.
Sometimes, as in the screenshot above, you have to move back at the end of the path.
You can tell by the reverse symbol at the end of the path.