MAPG-180 declare CSS and JS files

views/game.php

@@ -1,14 +1,7 @@
-@extra
-<?php
-$cssFiles = [
-    'css/game.css'
-];
-$jsFiles = [
-    'https://maps.googleapis.com/maps/api/js?key=' . $_ENV['GOOGLE_MAPS_JS_API_KEY'],
-    'js/game.js',
-];
-?>
-@endextra
+@css('css/game.css')
+
+@js('https://maps.googleapis.com/maps/api/js?key=' . $_ENV['GOOGLE_MAPS_JS_API_KEY'])
+@js('js/game.js')
 
 @extends('templates/layout_full')