Project Notes

INSTRUCTIONS: Use the arrow keys, w, s, a, d and k, i, l, j 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 marble 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. THINGS TO TRY: * Make your own tracks by drawing a new background. Just use the same shade of green for the grass. * Make a new costume for the ball. * Make obstacles (even moving obstacles!) that slow you down or stop you, or ramps that speed you up.