if you want it more "heavy" then look into CSS transitions and all other fancy html5 goodness.
The thing is that I want something with a lot more operations than I could handle with PHP/mySQL... I took DwarfFortress as an example because it does tones of operation, creating cultures and all of that. (I love the concept of this game, though I blame me for not being able to keep teaching myself how to play it.)
Though, as Mychii said, this is really more of a learning exercise than anything else... I didn't start it, though. The thread was really about "was it possible?" and "was there some advice?" Kamac provided, once more, some great advice! So, I'm really glad that I started this thread.
Indeed, I might end up simulating most of HTML/JS behavior... But I'll have learned some C++! :D