its ok
Lets start with the good. The paddle and background were well drawn, and the birds fading out was done well.
How about some improvements. When the ball is at the edge of the screen, it can't be hit. The player has to mouse over to start, then the ball immediately appears in the middle, kinda hard to reach. When the ball is missed, a new one immediately appears in the middle, again hard to reach if it passed beside the paddle where it couldn't be reached. I would suggest a start button that appears in the middle of play, or click wherever to serve, and allowing the player to reserve when they miss.