gameinit.js

    //  Create the starfield.
    var container = document.getElementById('starfield');
    var starfield = new Starfield();
    starfield.initialise(container);
    starfield.start();

    //  Setup the canvas.
    var canvas = document.getElementById("gameCanvas");
    canvas.width = 800;
    canvas.height = 600;

    //  Create the game.
    var game = new Game();

    //  Initialise it with the game canvas.
    game.initialise(canvas);

    //  Start the game.
    game.start();

    //  Listen for keyboard events.
    window.addEventListener("keydown", function keydown(e) {
        var keycode = e.which || window.event.keycode;
        //  Supress further processing of left/right/space (37/29/32)
        if(keycode == 37 || keycode == 39 || keycode == 32) {
            e.preventDefault();
        }
        game.keyDown(keycode);
    });
    window.addEventListener("keyup", function keydown(e) {
        var keycode = e.which || window.event.keycode;
        game.keyUp(keycode);
    });