Awesome!! Only got Afghanistan - Bahrain plus a few ones at the end. To make it even harder you could hide the already guessed answers by coloring the text white.
Yes. That works when you make the quiz not when you play-test it nor play it. But you can actually hide it if you're willing to delete the alphabetical order (delete all blocks, rows, and columns).
Yes. You should make that clearer "No map, alphabetical order…" does imply "No map, NOR alphabetical order…", you could write something like "Alphabetical order, exact spelling, all white backround, with NO map…".
For me, the only hard part is, the time; I can name all Countries (even without a map, nor an answer grid, I made 4 quizzes about that, none are submitted), I can also write them without typos, alphabetical order... I finished all "Countries starting with...", and the rest is just remembering and trying, but my best time in the Countries of the World Quiz is a little over 5 Minutes... this Quiz only has 5 Minutes.
To be honest @NAME0Zzandlers, I'm out of the quizzes. I will barely make new ones, and I (sadly) won't be updating this quiz, which was lazily made. I'm in the blogging community, you might see me there.