There are four arrows that correspond to your keyboard directional keys. Once the game starts, arrows would start scrolling up. Time the key pressing of the corresponding keyboard directional keys once the scrolling arrows overlap it. You score with every timed arrows.Build up your groove meter, clear the stage and continue into the score board where you can view your results. 

Dropoff	Super Metal Armor
Ultimate Sonic	Mission to Mars
Snowboarder XS	Penguin Diner
Roller Coaster Ride	Stan Skates
Surfs Up	Street Sesh