Well, I'm kinda pixel-arting a map of it, but yes, I do mean that the entire dungeon would be different completely for every floor. Yes, the players would decide which direction they want to move before moving. In SAO, there was a complicated plot that involved everyone being trapped inside a video game, and if they died, they would die in real life. In this, if you die, you would be restarted back to the beginning. I'm thinking that there would be a boss at the end of every floor, and each one would drop a revival stone, or something like that, and if the person accepted, the dead person would be brought back to the place where they died, with their stats and items. The way the dungeon would be layed out with a large amount of rooms, and each room would have enemies in them, which would drop small things, and that they would be guarding a chest, which would contain actual quality items.