I have something to point out about the paddle. In pong, the whole surface, left and right sides, can be used to hit the ball. As the original paddle is flat.

The paddle design now has parts on the ends that will deflect the ball in some strange ways.

However, the new paddle could be a big plus for the new version of the game.
as the player either has to be much batter at aiming the paddle or the ball may bounce with some other somewhat unpredictable behavior. So it may be a good thing!

In fact, I think I would rotate the ends 45 degrees so they have edges facing forward. This would deflect the ball very differently than just the flat surface !

As for the wall textures, I would simply scale them so they align better.

Have fun! You'll learn a lot with making these games!

- Jason