I know this was said a lot of times already but still, the concept is really interesting! Since both your roles are going to be reversed while you play, when you play as the character you want to make as much progress as possible but not too much or you're also giving an advantage to your opponent, and when you're the dungeon master you want to make the task hard for the player, but not too hard because you'll have to play right after! 👏
A very nice idea! Would be even better with more dungeons to keep players on their toes. Great job! 😁