well that sucks. this game was one of the best 'cute is justice' moege porn games I've seen. the style is a huge selling point. Hopefully you can find a solution that keeps the same spirit but is not the same style?
We're working on switching to the Godot engine, as well replacing all of the art, which might take a while... But all of the foundation is there, and we're just porting it all over, refining the code and adding some quality of life features
Easier said than done, but I do think that the art changes, depending on who you ask, is going to be a lot cuter