Nice quiz, but perhaps consider a comment about Italy. Though initially an Axis power, it flipped sides in the middle of the war and joined the Allies. Perhaps something along the lines "Click on all the countries that were part of the allies in World War II when they initially joined the war."
I mean… they didn’t really flip sides in the middle. They were invaded by the Allies and surrendered, more or less, and the people got rid of Mussolini. I think any historian would immediately label Italy as an Axis power.
I hear you, but there was at least a moment of WWII where Italy was an ally. It's an imperfect wording of the question with Italy as an option at the end of the day.
A caveat should be included that countries that switched sides don't count, I wasn't quite sure what to do when I got to Romania and erred on the side of caution.