I write only my opinion, this is no review ;-) Please, consider this.
I think, you made the mistakes of a beginner, therefore your castle is quite boring .... why?
Becaus it is not a castle, it is a graphic construction and you constructed first the castle, seemly, and afterwards the landscape .... but this is no landscape, too, or, better, one without ideas ...
no one would build such a castle in such a landscape in reality.
And you build first the castle, right?
A common mistake. But in reality, there is first the landscape, and the catlebuilders are following the countryline, the possibilities, which are given through the way of the hills, the rivers, e.t.c. This is the reason for remarkable, characteristic castles.
Bevore building your SH - castle, you should make the landscape.
And you should consider, where from the poor inhabitants get the resources. Your map woulkdn't be able to give your inhabitants enough supplies. And more: Which cKing or Lord would be able to pay the costs for such an at last useless building?
I recommend: So: develop first the landscape, and try, to find the strongest type of castle, using the features of your landscape. Consider, where are the resources, are they enough or will the inhabitants of the castle them buy.
I said, this is no review, it is my oppinion. I can't say anything about the playability.