I think what you're referring to is how the game is played? Well it's pretty simple actually it's similar to the band practice mini game you could pay as a teenager, anyways to play the game you have to click the corresponding buttons as the bars move over the arrow that is at the bottom of the screen, to hit the top bar you would hit the left button, to hit a bar that's in the middle you would hit the middle button, and to hit the bottom bar you would hit the right button, also make sure that the bar is directly over the arrow.