Pong game Pygame Zero | Python Fiddle

#setup the constants
WIDTH = 500
HEIGHT = 300
PADDLESPEED = 5

def reset_game():
    #position the ball
    ball.x = WIDTH / 2
    ball.y = HEIGHT / 2
    #set initial direction of ball
    ballDirectionX = 1
    ballDirectionY = 1
    #position the paddles
    pad1.x = 10
    pad1.y = HEIGHT / 2
    pad2.x = WIDTH - 10
    pad2.y = HEIGHT / 2

#create a rectangle of the playing area
screenRect = Rect(10,0,WIDTH - 10,HEIGHT)

#create ball
ball = Actor('ball')

#create paddles
pad1 = Actor('paddle')
pad2 = Actor('paddle')

#reset the game
reset_game()

#setup the goals
goals = [0, 0]

def draw():
    screen.clear()
    ball.draw()
    pad1.draw()
    pad2.draw()

def update():
    #move the paddles
    if keyboard.q:
        pad1.y = pad1.y - PADDLESPEED
    if keyboard.a:
        pad1.y = pad1.y + PADDLESPEED
    if keyboard.k:
        pad2.y = pad2.y - PADDLESPEED
    if keyboard.m:
        pad2.y = pad2.y + PADDLESPEED

#move the ball
    ball.x = ball.x + ballDirectionX
    ball.y = ball.y + ballDirectionY

#has the ball left the screen?  
    if not screenRect.contains(ball):
        
        #did it hit the top or bottom?
        if ball.top < 0 or ball.bottom > HEIGHT:
            ballDirectionY = ballDirectionY -1
            
        #it must have hit the side
        else:
            if ball.left < 10:
                print("Player 2 goal")
                goals[1] = goals[1] + 1
                reset_game()
                sleep(2)
                print("Score {} : {}".format(goals[0], goals[1]))

elif ball.right > WIDTH - 10:
                print("player 1 goal")
                goals[0] = goals[0] + 1
                reset_game()
                sleep(2)
                print("Score {} : {}".format(goals[0], goals[1]))
    
    #has the ball hit a paddle
    if pad1.colliderect(ball) or pad2.colliderect(ball):
        ballDirectionX = ballDirectionX * -1

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