I Am a High-dimensional Life

What does the author think of high-dimensionality? Is it high-dimensional if he has awesome skills? Also, the protagonist feels stupid. He has traveled to another world and his vigilance is so bad? What do others say? You can't accept your identity so quickly! And there was another dream before, so why didn't he doubt it? Just accept it as a matter of course? And still have a relationship with a strange woman? And omniscience does not work on people, so you don't feel that the construction of this place is fake as soon as you wake up? Or do you know when this place was built? It's the same as a system appraisal, the level is down in one go!