INSTRUCTIONS: Use the arrow keys to race your marble around the track to the finish line. If you slide off onto the grass, it will slow you down. What's your best lap time? HOW IT WORKS: The ball has variables for its x and y velocities. The arrow keys make it accelerate by changing the velocities. The grass slows you down by multiplying the velocities by a fraction. press space bar to change race course. press 1 to change the ball. hope you enjoy!