To be fair, "gigantic and randomly generated" is kinda par the course for rougelike dungeons, which is what those dungeons appear to be.
...Not that I cared for the game in the five or ten minutes I played of it, mind you.
On the topic of SCGardgen's games, I've honestly never beat any of them. I got to the endgame on the second and third games, but that's about it. Never really got anywhere in the first one, sadly.