speed issue

[aroary]

There seems to be a problem with the speed calculations related to #27 .

if ball_position[0] <= 5 + p1_paddle_width + radius / 2 and p1_position - radius / 2 <= ball_position[1] and p1_position + p1_paddle_height + radius / 2 >= ball_position[1] and speed < 0:
    speed *= -1
    if ball_position[1] >= p1_position - radius / 2 and ball_position[1] <= p1_position - radius / 2 + 15 and vertical_speed > 0:
        vertical_speed = vertical_speed * -1 - 1
    elif ball_position[1] <= p1_position + p1_paddle_height + radius / 2 and ball_position[1] >= p1_position + p1_paddle_height + radius / 2 - 15 and vertical_speed < 0:
        vertical_speed = vertical_speed * -1 + 1
    else:
        vertical_speed -= .25
    if audio:
        pygame.mixer.music.play()
if ball_position[0] >= width - 5 - p2_paddle_width - radius / 2 and p2_position - radius / 2 <= ball_position[1] and p2_position + p2_paddle_height + radius / 2 >= ball_position[1] and speed > 0:
    speed *= -1
    if ball_position[1] >= p2_position - radius / 2 and ball_position[1] <= p2_position - radius / 2 + 15 and vertical_speed > 0:
        vertical_speed = vertical_speed * -1 - 1
    elif ball_position[1] <= p2_position + p2_paddle_height + radius / 2 and ball_position[1] >= p2_position + p2_paddle_height + radius / 2 - 15 and vertical_speed < 0:
        vertical_speed = vertical_speed * -1 + 1
    else:
        vertical_speed += .25
    if audio:
        pygame.mixer.music.play()