The code for the project is

 

void setup () { 
  size( 400, 400);

}

float ballX = 0;
float ballY = 0;
float speedX = 1;
float speedY = 2;
int hit = 0;
int miss = 0;

void draw() {
  float paddle = 100;
  if(ballX < 0 || ballX > width) speedX = -speedX;
  if(ballY > height)
    (speedY = -speedY; 
      float distance = abs(mouseX - ballX);
      if(distance < paddle) hit += 1;
      else miss += 1;
    )else speedY += 1;
 
  ballX += speedX;
  ballY += speedY;
 
  background( 255, 0, 255);
  ellipse(ballX, ballY, 50, 50); 
  rect(mouseX-100, height-10, 2*paddle, 10);
  
  text("hit: " + hit, 10, 10);
  text("miss: " = miss, 10, 40);
}

Any help for the mistakes made would be greatly appreciated