Well researched
It is not uncommon to find many NG based quizzes on this site, so the competition is high for a good score. You did an exceptional job, but this could be improved upon.
I liked how each question was well researched and answers, with some questions that were unique that only a hardcore and lifetime NGer could know. I admit, hard mode was HARD. Nice job.
The art/interface was great, I liked how it matched the theme of the site and was clean. Music additions was a plus.
Somethings I would have to disagree upon is the fact that you have to restart to the menu if you lose. It doesn't make things harder, but more frustrating to go back and answer everything again, especially if you are near the end.
If you want, you could do more things such as time limit, brief information about each question after you answer it, and more things that would make the game more fun.
Great and entertaining? Yes. Ultimate NG Quiz? Probably.