Interesting quiz, though when I ran out of ones that I knew for sure or could reasonably guess I still had 4 minutes left and eventually gave up out of boredom because I was just guessing random countries at that point. Also, they drive on the wrong side of the road in Hong Kong, too, though on the mainland they switch back to driving on the right. Not sure if that counts, it's only part of the country, but in at least one area of China they drive on the left.
No Kiribati, no Maldives, no Tuvalu. There are not two but three European left-driving countries, four if you count Cyprus. There are more than four left-driving nations in Oceania, even in the countries you have included. Somalia doesn't drive on the left and that still leaves only 14 African nations in your list, not 17.