You missed Vatican City. If you went with the name "Vatican City", "Va" would be the only answer for V, and if you went with the name "Holy See", "Ho" would be the only answer for H. Since JetPunk calls the country "Vatican City", I think changing the answer for V is the better way to fix this.
Moreover, why is "Ko" the only answer for K? Is it because you counted the two Koreas as "Korea, North" and "Korea, South", or is it because of a mistake? If it is the former, you should add another caveat. If it is the latter, the answer for K should be "Ka | Ke | Ki | Ko | Ku | Ky", since there are one countries each: Kazakhstan, Kenya, Kiribati, Kosovo, Kuwait, and Kyrgyzstan.
Moreover, why is "Ko" the only answer for K? Is it because you counted the two Koreas as "Korea, North" and "Korea, South", or is it because of a mistake? If it is the former, you should add another caveat. If it is the latter, the answer for K should be "Ka | Ke | Ki | Ko | Ku | Ky", since there are one countries each: Kazakhstan, Kenya, Kiribati, Kosovo, Kuwait, and Kyrgyzstan.