A Dungeon in most games often offers challenges for the Players that if they completed it, they'd receive a reward.
However, in most cases, Dungeons would eventually become an area to farm rare materials.
Only those games that were specifically designed to be difficult would a player truly feel the challenge. Otherwise, they'd just breeze through it without any problem and repeat it until their energy got spent.
And in this Dungeon's case, it might've shocked Aldrin at the start but upon encountering the 'monsters' lurking in the dungeon, he gradually accustomed himself to it that he eventually didn't need to make a move anymore or if he did, it's only to provide support to the three Dimensional Clones.
"It's a Normal difficulty... What do I expect? Encounter a Champion here? But I guess, it's about time to meet the Dungeon Boss." Aldrin muttered as he observed his surroundings checking if there's treasure chests or the like.
Alas, that didn't seem to be included in the system.