pong на одного игрока

index.js

var wall = {
  x : 400,
  y : 400
}

var player = {
  x : 0,
  y : 0,
  width : 10,
  height : 60
}

var ball = {
  x : 300,
  y : 200,
  width : 10,
  height : 10,
  vel : {
    x : 5,
    y : 5,
  },
}

function setup() {
  createCanvas(400, 400);
  
}

function draw() {
  background(220);
  player.y = mouseY-player.height/2
  drawObj(player);
  ballstep();
  drawObj(ball);
}

function drawObj(obj){
  rect(obj.x,obj.y,obj.width,obj.height)
}

function ballstep(){
  ball.x = ball.x + ball.vel.x;
  ball.y = ball.y + ball.vel.y;
  
  if(ball.x+10 > wall.x) ball.vel.x = -ball.vel.x
  if(ball.y+10 > wall.y || ball.y < 10) ball.vel.y = -ball.vel.y
  
  if (player.y+60 > ball.y && player.y < ball.y){
      print("отобьет");
  }else{
      print("гол");
  }
  
  if(ball.x < 10){
  if (player.y+60 > ball.y && player.y-10 < ball.y){
      ball.vel.x = -ball.vel.x
      mul = ball.vel.y/abs(ball.vel.y)
      ball.vel.y = mul*random(5)
    }else{
      print("Game over")
      return
    }
  } 
  
  //print(ball.y)
  
}