Great quiz, can you do anything about the bottom right answer? The islands are so sparse you can’t really make out any of the flag. Granted it is fairly obviously an island nation, but the flag it very hard to see, even if you click on it.
I got it immediately from the shape of the country. There's a V in it. That's my "mnemonic" for recognizing Vanuatu. There's also a V in the flag, if you look at it the right way.
On the general jetpunk policy: With Crimea considered on jetpunk to be a part of Russia, it is somewhat inconsistent to consider Bergkarabach a part of Azerbaijan, isn't it?
Bright Side was right that my eyes were sharp xD