It's a wording problem, quick fix. Instead of:
You answered (nation) flag incorrectly!
Have it be like:
You guessed (nation), but the correct answer was (nation)!
Absolutely it looks great.
You answered (nation) flag incorrectly!
Have it be like:
You guessed (nation), but the correct answer was (nation)!
Absolutely it looks great.
Hope this helps :)