I tested your game and I find it really good so far. It would be good to add other languages later such as French, Spanish etc.
so I have a question. up to what point in the original work was this game made?
You mean the complete game? Uh... Years, probably. Between 2 to 3 years is what I needed to complete my previous projects, but hard to tell at this point. If you mean R6, next month.
-Edit-
If by full you mean when the heroines will start become available, the first two relationships (Rias and Asia) will happen not too long after Riser's saga. Very close, and from there, as the story progresses, you'll "unlock" more heroines.