Pretty good! Plays smoothly, feels responsive, looks good, sound is nice as well. I only think the bounces are a bit 'off'. I'd expect the ball to change the direction (180 degrees) when it hits on the side of the paddle and I expect the angle to get steeper when a bit from the side.
Adding it to the docs is always a good idea indeed. I did notice I could influence the angle by moving the paddle before already. However, it is different from what I'm used to with these breakout type of games, I would expect the place where the ball hits the paddle also influences the angle. However, it's your choice of course, just wanted to give you that feedback :)