If anyone wants to try the 'Southernmost' version here's the link: http://www.jetpunk.com/user-quizzes/81968/all-countries-by-southernmost-point-on-land
There are slight differences to the other quiz (northernmost with empty map), e.g. the sequence malta, lebanon, morocco, cyprus, india... differs. As well as Honduras begins not farther north than guatemala... :-) But anyway, still a good quiz!
I'd suggest that the position of Mauritius is contentious. Putting it north of Madagascar clearly indicates that you are including the Chagas archipelago - which I applaud, but which UK (who controls the archipelago) regards as a separate territory. Standard jetpunk policy is to consider the de facto owners of an area as the actual owners, so, sadly you need to amend this.
Good work though!