Good quiz, it would be nice to see alternative spellings work. For Zaporizhzhia alone you have Zaporozhje, Zaporizhe, Zaporizhzhya, Zaporozhie which are all authorized spellings for official documents...just something to consider
Great quiz, and a wonderfully detailed map! The only issue I noticed was that "Kyiv" works as a type-in for the oblast, but not for the city. Might be good to fix that :)