This is the case for all of my crossword quizzes - type-ins aren't accepted. Since it's a crossword, you should theoretically have to type each letter.
This is great! The difficulty of the countries is chosen just right - I was able to get the most difficult ones with the help of the letters I "won" by guessing the easier ones correctly.
Words: A, B, C, D, E, F, G, H, I, J, S
Others: Colours, Elements, Numbers
1:01 🔥
Also it's standard for all of my crossword quizzes to not have yellow boxes.