Thank you for answering my questions.
I found it helpful to go back to some 'marked' questions and possibly review my answer. As you mentioned you marked some questions on a notepad, are you familiar with the corresponding option available in the PMPrepCast Simulator? That is also available on the online exam as well. Even if you decide not to go back to them and review your answer, it would still be useful when you review all the questions, because you can focus more on those you marked throughout the exam.
My next question on possibly overlooking some keywords came from my experience, as sometimes I noticed that I did overlook some keywords; e.g., I thought the questions was asking me what option was correct, and I missed the EXCEPT keywords, so I would have gotten it all wrong. Typically, in that case I was struggling between at least two options (as, in fact, three out of four were correct!), so I marked it and went back to it later. While reviewing it, I finally noticed the EXCEPT word in the question, and so I could answer the question more confidently and correctly. If I hadn't reviewed it, I would have got it wrong for sure.
Hope this helps,
Gabriella