This is such a great quiz. A couple of other small things to fix. Next to Botswana, there's a typo in Namibia. And at the moment it says that the Philippines's longest border is with the Czech Republic....! I don't think Philippines should be in this list at all, should it?
I was unable to finish - could do with another minute, IMO. Also, I find the idea that Eswatini's longest border is with Norway to be challenging to my notion of World geography.