I'm really confused as to what you're looking for. Countries entirely located on peninsulas, countries in with a significant portion of the land on peninsulas, or something else? I tried multiple countries, but only three where accepted.
Where are Denmark, Malaysia, Greece, Turkey, Spain and Portugal? I'd think these are obvious countries on peninsula, rather than island countries such as Haiti, Dominican Republic and PNG.
I believe Malaysia is connected to Thailand as well as Indonesia.
Spain is connected to Portugal, and only two sides are bordered by water. Same with Portugal.
Haiti, DR, and PNG are not islands because they border one another (Haiti borders DR, vice versa). However, PNG borders Indonesia, but Indonesia is connected to Malaysia and Singapore.
Under your definition, how can you include Sweden or Vietnam? Norway forms one border of Sweden and it is connected to Finland on another. Vietnam is connected to Laos, Cambodia, and China and only has water on two sides. Ireland should be included if you include Haiti and DR, as it is surrounded on three sides by water and connected to Northern Ireland (UK) on the other. I agree with the others. This is a strange and confusing quiz.
This quiz is terrible. Islands like Ireland and Hispaniola aren't peninsulas and you forgot stuff like the Arabian peninsula and the Iberian peninsula.
I believe Malaysia is connected to Thailand as well as Indonesia.
Spain is connected to Portugal, and only two sides are bordered by water. Same with Portugal.
Haiti, DR, and PNG are not islands because they border one another (Haiti borders DR, vice versa). However, PNG borders Indonesia, but Indonesia is connected to Malaysia and Singapore.