code: function Handle(isLeft, scene) {
      this.height = settings.handleHeight;
      this.width = settings.handleWidth;
      this.x = isLeft ? 0 : scene.width() - this.width;
      this.y = (scene.height() - this.height) / 2;
  
      var offset = isLeft ? this.width : 0,
          intersect = new Geometry.Intersect();
  
      this.hit = function ballHitsHandle(ball) {
          return intersect.run(this.x + offset, this.y, this.x + offset, this.y + this.height,
                          ball.x, ball.y, ball.x + ball.vx, ball.y + ball.vy);
      };
  
      this.move = function moveHandle(direction) {
          var y = this.y - direction;
          if (0 <= y && y <= scene.height() - this.height) {
              this.y = y;
          } else {
              this.y = y < 0 ? 0 : scene.height() - this.height;
          }
      };
  }
docs: Represents a single ping pong handle either left or right