Thank you for playing!
• As for easy enemies, if you didn't leave the tower, first time game starts (when you enter the tower) with default difficulty, later entrances let you pick your difficulty. As I saw too many times when new players picked hard and hate quitted soon on floors 2 and 3.
• As for ????, it means your hero had 'Oblivious' inborn trait, for such chars you have to open the char window to see the stats and they can't memorize healing potions on the map.