I find this quiz impossible because the smaller places are invisible on my computer screen and so are Fiji and surrounding countries hidden by an advertisement.
Unfortunately, I have the same problem as CardinalSin. I don't see Oceania because ads are covering it and it's almost impossible to see most of the microstates and smallest islands (especially in North America and Europe). If these mistakes were fixed, however, this would be a fantastic quiz. I always mix up the small island nations.