Edit in JSFiddle

Crafty.init(600, 300);
   Crafty.background('rgb(127,127,127)');
   //Paddles
   Crafty.e("Paddle, 2D, DOM, Color, Multiway")
   .color('rgb(255,0,0)')
   .attr({ x: 20, y: 100, w: 10, h: 100 })
   .multiway(4, { W: -90, S: 90 });
   Crafty.e("Paddle, 2D, DOM, Color, Multiway")
   .color('rgb(0,255,0)')
   .attr({ x: 580, y: 100, w: 10, h: 100 })
   .multiway(4, { UP_ARROW: -90, DOWN_ARROW: 90 });
   //Ball
   Crafty.e("2D, DOM, Color, Collision")
   .color('rgb(0,0,255)')
   .attr({ x: 300, y: 150, w: 10, h: 10, 
   dX: Crafty.math.randomInt(2, 5), 
   dY: Crafty.math.randomInt(2, 5) })
   .bind('EnterFrame', function () {
   //hit floor or roof
   if (this.y <= 0 || this.y >= 290)
   this.dY *= -1;
   if (this.x > 600) {
   this.x = 300;
   Crafty("LeftPoints").each(function () { 
   this.text(++this.points + " Points") });
   }
   if (this.x < 10) {
   this.x = 300;
   Crafty("RightPoints").each(function () { 
   this.text(++this.points + " Points") });
   }
   this.x += this.dX;
   this.y += this.dY;
   })
   .onHit('Paddle', function () {
   this.dX *= -1;
   })
   //Score boards
   Crafty.e("LeftPoints, DOM, 2D, Text")
   .attr({ x: 20, y: 20, w: 100, h: 20, points: 0 })
   .text("0 Points");
   Crafty.e("RightPoints, DOM, 2D, Text")
   .attr({ x: 515, y: 20, w: 100, h: 20, points: 0 })
   .text("0 Points");