Lorelei and the Laser eyes was one of my favorite games that I played this past year. I think it might be good for a non-gamer, but they had better absolutely love puzzles. Also some of the puzzles require playing videogames within the main game and I can't remember exactly, but they may not make much sense or be very fun if you don't have experience with like PS1 era horror games.
For The Witness, I would recommend tagging it as appropriately not accessible. There is a section that can't be completed at all without hearing, and large chunks of the game that I can't imagine are possible with color blindness. I don't have either of these issues, but running into those things really rubbed me the wrong way. It is a game that seems to value the creators vision above all else and isn't willing to make any sacrifices for the audience.
Edit: I realize I misread and thought you were saying you were going to add The Witness to the non-gamer list, which was why I was saying that a disclaimer would be extra useful. Left it anyway.
For The Witness, I would recommend tagging it as appropriately not accessible. There is a section that can't be completed at all without hearing, and large chunks of the game that I can't imagine are possible with color blindness. I don't have either of these issues, but running into those things really rubbed me the wrong way. It is a game that seems to value the creators vision above all else and isn't willing to make any sacrifices for the audience.
Edit: I realize I misread and thought you were saying you were going to add The Witness to the non-gamer list, which was why I was saying that a disclaimer would be extra useful. Left it anyway.