I enjoyed this quiz :) Some things I would say is I think a minute or probably even 30 seconds can be increased in time. Also, it would be better if you will use their actual population instead of rank, rounded to million people. There is an error as well that the easter part of map, which include Oceanic Countries like New Zealand, Fiji, Samoa, etc. is not on the Map of your quiz.
Good suggestion on the population. I increased the time by 30 seconds, but failed to fix the map bug. Thank you for your help @GeoPhilia, I'm fairly new to this.