You are wrong, we only think we're playing DF.
In reality, DF is playing us.
"What if we gave the humans the internet? I don't know, lets code it in and find out. Hey look, they would create a game about us! Hahaha, we look so silly!"
Wait, if I realize that this reality is just a computer simulation, will I start to see everything in descending green ASCII characters?
Well if this indeed were true.. then why haven't I already been thrown ino magma/lava yet?
Our world has already stabilized, had all the bugs worked out, and advanced technologically. We've forgotten about all the wonky physics and fantasy elements, mostly due to a psychic
Weirdness Censor caused by repeated bugfixes and a few government coverups. Not only is this reality a simulation, so is the reality on which ours is based. With each iteration there is a certain amount of error in the accuracy of the simulation, causing the resultant world to develop slightly differently. As the chain of recursive realities extends to infinity, every possible universe is represented somewhere down the line. The only event common to every iteration of the universe is the existence of the Great Toady One, a being who, at some place and some time in the universe, is destined to create the simulation which will proliferate the cycle and begin the next iteration.
I call this the Dwarven Multiverse Theory.