for the paddle,
you have
int Paddle = 100;
// but
rect(xPaddle,yPaddle,200,10);
//
if ((xPaddle - Paddle) < xBalle && (xPaddle + Paddle) > xBalle &&
(yPaddle - 10) < yBalle && (yPaddle) > yBalle) {
//
you are confusing yourself with this settings
possibly also comes from some rectMode(CENTER) thinking??