Oh, you're right. I tried multiple games under both Firefox and Chrome, and nothing. I'll loop in @Gantic and @MrDayCee to see if they know anything about this. I have no idea what's going on.
To follow up on the issue, the address bar does change to either #lightsout or #maximize but there's no actual effect on the game.
Thanks for letting us know, @STEX5150 - hopefully we can get this sorted soon.
It looks like we found the cause of this and have put in a fix. Can you guys please re-test these features and let us know if it's still not working for you?