Nice Quiz. You should give a hint for Hong Kong since it's not a Jetpunk Country. And I think 15 minutes is to long because it's possible to simply type in every country in that timespan.
That's most likely a result of this quiz not including the athletics or swimming events, as it would have had too many rows for one quiz to handle. Links to separate quizzes for the athletics and swimming events are in the caveats 👍🏻