Crafty JS

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(200, { 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(200, { 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('UpdateFrame', function () {
        //hit floor or roof
        if (this.y <= 0 || this.y >= 290)
            this.dY *= -1;

        // hit left or right boundary
        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");