I have both entered and (counter to the name) exited the dungeon, princess in tow. I enjoyed the atmosphere set by the music and the variety of challenge rooms to pass through. Though, I do think the player's hitbox could be a little more forgiving when it comes to the spike and invisible "wall" floors. It's a little bit of a pain to get perfectly lined up with each of the corridors.
I wonder what gimmicks you'll come up with next!