Not sure it's an actual bug, as I'm able to continue into the game, but I'm getting a warning when choosing Dark Matter Dice. I've logged into Subeta from Firefox, Google Chrome, and Microsoft Edge, and the warning shows up in all three browsers.

Warning: Use of undefined constant SITE_DOMAIN - assumed 'SITE_DOMAIN' (this will throw an Error in a future version of PHP) in /var/www/html/src/games/dmd_fns.php on line 69