What browser are you using?
Have you tried any other browsers? Have you tried disabling any browser plugins that might be affecting any JavaScript stuff on your browser?
Yeah, the 'uh oh something broke' message is intentionally displayed by default until the game data loads (because if it doesn't load, that means that something has gone wrong).
I've never used Waterfox myself, but I guess that there's something weird in that browser that doesn't like this hypertext game framework. But I'm glad that you were eventually able to play it.