Wolfenstein 3D browser version

This is the code for the browser version of Wolfenstein 3D which is
playable on http://www.wolfenstein.com/game_NA.php

js/load.js

@@ -0,0 +1,126 @@
+/*
+* ===========================================================================
+* 
+* Wolf3D Browser Version GPL Source Code
+* Copyright (C) 2012 id Software LLC, a ZeniMax Media company. 
+* 
+* This file is part of the Wolf3D Browser Version GPL Source Code ("Wolf3D Browser Source Code").  
+* 
+* Wolf3D Browser Source Code is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 2 of the License, or
+* (at your option) any later version.
+* 
+* Wolf3D Browser Source Code is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+* 
+* You should have received a copy of the GNU General Public License version 2
+* along with Wolf3D Browser Source Code.  If not, see <http://www.gnu.org/licenses/>.
+* 
+* If you have questions concerning this license, you may contact in writing id Software LLC, c/o ZeniMax Media Inc., Suite 120, Rockville, Maryland 20850 USA.
+* 
+* ===========================================================================
+*/
+
+
+(function($) {
+
+// these files are preloaded while the title screen is showing
+var files = [
+	"js/requestanimframe.js",
+
+    "js/wolf.js",
+    "js/random.js",
+    "js/angle.js",
+    "js/math.js",
+    "js/input.js",
+    "js/sound.js",
+    "js/menu.js",
+    "js/file.js",
+    "js/game.js",
+    "js/player.js",
+    "js/sprites.js",
+    "js/powerups.js",
+    "js/ai.js",
+    "js/actorai.js",
+    "js/actors.js",
+    "js/actstat.js",
+    "js/weapon.js",
+    "js/doors.js",
+    "js/pushwall.js",
+    "js/areas.js",
+    "js/level.js",
+    "js/raycaster.js",
+    "js/renderer.js",
+   
+    "js/episodes.js",
+    "js/maps.js",
+
+    "preload!art/menubg_main.png",
+    "preload!art/menuitems.png",
+    "preload!art/menuselector.png"
+
+];
+
+// these files are preloaded in the background after the menu is displayed.
+// only non-essential files here
+var files2 = [
+    "preload!art/menubg_episodes.png",
+    "preload!art/menuitems_episodes.png",
+    "preload!art/menubg_skill.png",
+    "preload!art/menubg_levels.png",
+    "preload!art/menuitems_levels.png",
+    "preload!art/skillfaces.png",
+    "preload!art/getpsyched.png",
+    "preload!art/menubg_control.png",
+    "preload!art/menulight.png",
+    "preload!art/menubg_customize.png",
+    "preload!art/control_keys.png",
+    "preload!art/confirm_newgame.png",
+    "preload!art/paused.png"
+];
+
+$(document).ready(function() {
+  
+    var progress = $("<div>"),
+        n = 0;
+
+    progress.addClass("load-progress").appendTo("#title-screen");
+    $("#title-screen").show();
+    
+    
+    yepnope.addPrefix("preload", function(resource) {
+        resource.noexec = true;
+        resource.instead = function(input, callback) {
+            var image = new Image();
+            image.onload = callback;
+            image.onerror = callback;
+            image.src = input.substr(input.lastIndexOf("!")+1);
+        };
+        return resource;
+    });
+
+    
+    Modernizr.load([
+        {
+            load : files,
+            callback : function(file) {
+                progress.width((++n / files.length) * 100 + "%");
+            },
+            complete : function() {
+                progress.remove();
+                $("#title-screen").fadeOut(1500, function() {
+                    Wolf.Input.init();
+                    Wolf.Game.init();
+                    Wolf.Menu.show();
+                });
+                // preload non-essential art
+                Modernizr.load(files2);
+            }
+        }
+    ]);
+});
+
+})(jQuery);