BreakOut.js

var BreakOut = (function() {

    "use strict";

    var defaults {
        ball: {
            position: {
                x: 200,
                y: 200
            },
            velocity: {
                x: 18,
                y: 10
            }
        },
        canvas: {
            height: 600,
            width: 600,
        }
    };

    var ball = {
        position: {
            x: defaults.ball.position.x,
            y: defaults.ball.position.y
        },
        velocity: {
            x: defaults.ball.velocity.x,
            y: defaults.ball.velocity.y
        }
    };

    return {
        collide: function() {
            if (ball.position.y + ball.velocity.y <= 0) {
                ball.velocity.y = -ball.velocity.y;
            }

            // ... so on, so on
        }
    }
})();