world-game/site/config/config.php

<?php

return [
    'debug'     => true,
    'languages' => true,

    'panel' => [
        'css'   => 'assets/css/custom-panel.css',
        'theme' => 'dark',
        'menu'  => require __DIR__ . '/menu.php',
    ],

    'thumbs' => require __DIR__ . '/thumbs.php',
];