Holy shit... That's nuts. I do see the occasional boolean in there. But it might as well be ifs ints and strings like you said.

Man went full static C programming in C# and coded the whole thing in what looks like one class. Instances?, loops excepting XNA gameloop? What's that? Whos that? Where's that?

Honestly I'm not even mad, that's dedication. Dedication and a refusal to learn more than just the basics. Kinda want to buy the game now just to see how far a fucktonne of if statements can get. By the looks of it, I'd say straight into the dragons maw.