Okay, but where/how is it all made? I guess it's fair to say that they aren't just monkeys and crocodiles, but so much of that stuff just doesn't fit the picture. Tires, for instance... I mean, there are no cars, so why would they manufacture tires? Maybe they discovered one, realised that it was quite convenient to bounce on, and recreated them in some kind of jungle rubber engineering plant?
Maybe the answer (as always) is just that "it's a game, it doesn't have to make sense", but I think there could be some interesting theories on the matter out there.
Oh, and Kremlings being intelligent? Don't make me laugh!