To just start off, I have to give kudos to the creator for making such a realistic horror type game using personifications of countries as characters. I haven't seen much of the anime it's based on so I don't know how OOC some of the characters are at times, but for the most part people say they're fairly accurate, so I'll take their word for it.
Now I won't exactly spoil anything, but our poor countries go through A LOT of abuse through this romp of a horror RPG, especially Italy and England. However, what abuse they go through I'll leave you to find out.
Battles are played out a la Final Fantasy, with each character/enemy having an ATB gauge, and it's their turn when the gauge fills up. However, most enemies offer very meager experience, so your characters will stay at their given level through the entire game. My only complaint is that there are a lot of battles that are not directly fought, only seen, and sometimes you can fight the monsters off and sometimes you have to run from them. It doesn't make a ton of sense to me, and being a battle crazed psycho I'd have loved for more battles to be in this game.
Finally, I have to say that the music in this game is PHENOMENAL, especially the battle themes, which I find simply amazing. I even listen to them outside of playing the game.
In conclusion, if this game had been completely finished and there were less battles that were only watched, I'd love it even more. As it stands I'd give it five stars, as the only blemish to this game is that there simply isn't an ending.