I like the quiz even though I missed a lot of them (even Newfoundland! Duh!) I'm not totally sure whether Jetpunk will officially accept the fourth-biggest European island being that far east of Cyprus, Armenia etc., although I don't suppose you need to worry about that until the eventual featuring eh.
in Oceania, everything is an island, so Australia and New Zealand should count. Also, Greenland belongs to Denmark, so it is European, not North American.
Mainland Australia is a continental landmass, as well as the mainlands of Afro-Eurasia, Americas and Antarctica. New Zealand is not a single island; the two biggest are listed.
Greenland is still located in North-America, even if it politically belongs to Denmark.
Greenland is still located in North-America, even if it politically belongs to Denmark.