Love how you all completely disregarded the fact I said, "from what the eye can see". See, if you would have stated the exact specs of the cms instead of just saying, "custom cms"; being more informative about the introduction of your retro, being more specific on the details. Then my comment...
Seems it works fine if you don't use https.
Funny, I owned a boom-hotel back in 2012.
I wouldn't consider this to be a custom cms, from what the eye can see, it's the same, usual, re-released rev theme and a shock look-a-like index/register system (register still says UHabbo) everything else...