Yes, it was officially Romanized as Cheju until 2000. A lot of organizations and legacy names, for example Cheju Halla University and its airport code CJU, still reflect that spelling. It should be allowed as a type in.
When you create a quiz, look under more options. Click the add SVG map button after saving the quiz first. This allows you to add any maps you have saved on your computer that are under 400MB and at most 800 by 600px. After you upload the map, you should create a column just left of the answer column and title is "Paths". Then, enter all the paths, (they are the computer's way of changing the colour green when answered correctly and red when incorrectly). You can find the paths for each country, province, state, region, etc. by viewing the map in an external program. Before you submit, be sure the quiz is set to scroll for mobile users, (it's a manditory setting for a map quiz). For external editing programs, I would recommend NotePad++, Inkscape and NaturalEarth. NotePad++ and Inkscape are free, and I think NaturalEarth is too, (I don't have it so I can't be sure). Be sure to check out the Quizmaster's blog for more information.
Could you include kyuushuu as a type-in for kyushu? in Japanese you have a double sound, and the romanisation of it has long vowels, so it should be kyuushuu instead of kyushu.
Well, there is no such thing as Macau Island as far as I know (although Macau Peninsula used to be an island thousands of years ago before sedimentation started connecting it to Mainland China). 3 major islands of Macau: Greater and Lesser Taipa (together known as Taipa) and Coloane, are now connected via land reclamation, and there is still no official name of the new island.
The island was historically known in English as Formosa. Hong Kong is made up of 261 islands, the largest of which is Lantau, the second largest being Hong Kong.
9/10 Missed Shikoku
Only ancient Portuguese called Taiwan this name!