Pretty good game overall, just has a couple of quirks.
The first issue I noticed is that the puck goes wild even when the paddle gently touches it.
Secondly, the angle at which the puck bounces off the paddle is seemingly random which is noticable especially when the paddle is behind the ball.
It's also a bit uncomfortable that the ball spawns immediately after scoring. Try making a delay to make sure the players are ready. Otherwise, nice work!