greatest quiz here
About the quiz, I think this is one of the best quizzes here :)
Lost in with Gaza Strip, and double Oman/UAE confuses me.
You might consider putting an extra Spain-Morocco given that Peñon de Vélez de la Gomera is connected to the Moroccan mainland by a steady, natural sand bridge since 1934. See here: http://en.wikipedia.org/wiki/Peñón_de_Vélez_de_la_Gomera
For me the hardest was Southwest Africa - I didn't know about the exclave of Angola between DR Congo and Republic of the Congo. But I guessed eventually.
Just most of them...
After the coast of eritrea there is a small stip of coast belonging to Djibouti after which is eritrean coast again.