confusing categories
you seem to confuse allot of categories in the game, for example questions about sports games asking about athletes do NOT belong in the games category, some questions in the science category have nothing to do with science (asking what animal first orbited the planet has nothing to do with science, that's more like history) and as said before, to many questions are unlikely to be known to non-Americans.
that said, the game itself is fun and well-playable, i just didn't get many awnsers out of the categories other then games/science, which were a bit more general in terms of nationality (a.e. not asking for specific teams or individuals/Americans)