So when you load the game up you will be greeted by the sight of a guy and then the announcer will call out positions you need to move to. To get a point you need to match the move that is announced by pressing the D pad and a face button at the same time.
The moves that can be announced and their buttons are as follows:
"Up behind you" - Down and Triangle
"Down in front of you" - Up and Square
"Is back down" - Down and Square
"Space in front of you" - Up and Square
"Is up front" - Up and Triangle
"Left" - Left
"Right" - Right
For every fifteen points you will get a bronze trophy and get 315 points to clear all the medals.
This is easy enough to do it one go as you can speed up the game with the left stick. It took me 40 minutes in once sitting to finish the game.