90/100 is really a good score, you only missed two out of 20, that's very good.
I was reluctent to include the answers with the score, because I was thinking that for example if you get a very low score and then you see all the correct answers, it wouldn't make that much sense to take it again after that, because at that time you know all the right answers, my point was that you should work hard, and you will be able to get the answers yourself, besides all the right answers are in the website, I tried to include all the aspects that I included in the website, but if you both think it's a good idea to include the answers I will go ahead and do so.
