At some level this is a standard sword-and-sorcery fantasy novel (mostly sorcery). The device of role-players cast into the game "for reals" has surely been done before. The interesting part is the characters, and how the plot progresses.
The hero (gender neutral) is extremely anxious, and the book presents their struggles in a way that is both relatable and interesting. The reader (at least this reader) sees themselves in these struggles even if they don't normally identify as neurodivergent.
Don't hate me for not giving it five stars, a few of the romantic(?) scenes didn't quite work for me. Maybe that says more about me though.