Well then the best I can put it is it is a pause-able real-time character focused game where you influence the fate of your dynasty over many generations. Quill right now is playing as a kid, but eventually that character will grow up die and you will play as his successor and so on. Toss in a bit of Game of Thrones with trying to grow your lands and fighting over titles and you have the gist of the game. I guess the very basic goal of the game is to continue your dynasty and not have it die off over the generations. After that it is up to you.
My personnal description for this game is : "medieval ruler simulator". As in you're not really controlling a country or a civilisation, you're just controlling one character that happen to be in command of said country / civilisation.
I think i once said : "it's historical fucked up The Sims". Wich is not that exagerated in the end.