Learning Objectives:

• Write event listener code for mouse and frame events
• Write code to move movieclip instances
• Use of Math.random() to add randomness to the ball's starting position and speed

How the Completed File Works:

• The ball starts with a random angle and random y at the right edge of the stage.
• Every time the ball returns to the right edge to start again, its angle and y are randomized.
• The ball bounces off the top and bottom edges of the stage.
• The score is displayed on stage.
• Every time the paddle hits the ball, the score is incremented by 1.