lol there is 1 thing the author prob forgot but is the easiest solution to all of his mistake : he can kill himself again and again to turn back time and fix it everytime he did something wrong, this is a very big loophole
The game killed his brain not the soul. The game might be realy just a game. But all the demons, dead region and the people in it are real, well in the novel at least, Ryder and Janus probably are sons of some god.