Do you have the most updated Flash Player? Or it could just be construction on the site. Many things seem to be added on to the site, but just haven't been revealed yet.
I'm having trouble loadng almost every game.. The only ones I've found that work are Sinjid Shadow of the Ninja, and More Blox Rooms, but the latter has also stopped loadig. I'm just getting a white screen. No Red X or anything, just white where the screen should be displaying the game..