let vy=1.5;

let ballx=15;

let bally = 300; 

let score = 0;

​

function setup() {

  createCanvas(600, 600);

}

​

function draw() {

  background(220, 220, 220, 40);

​

  noStroke();

  fill(0);

  ellipse(ballx, bally, 30, 30);

​

  ballx += vx;

  bally += vy;

​

  rectMode(RADIUS);

  rectW = 10;

  rx = width*0.75

  ry = mouseY

  rect(rx, ry, rectW, 50);

  text("score:" + score, width/2, 30);

​

  if ((ballx-10) < 0){

    vx *= -1;

  } if ((ballx+10 )>width) {

    vx *= -1;

  } if ((bally-10) < 0 || (bally+10) > height){

    vy *= -1;

  } if ((ballx+10 == rx-(rectW/2)) && (bally-10 < ry+25) && (bally+10 >ry-25) && (vx>0)){

    vx *= -1;

    score++;

  }

}