Ignore the koronbanon.
Many years ago, koronba (the creator of lcddem) disappeared from the internet entirely, requesting people to never speak of his projects again, I guess so they could be forgotten.
Obviously, this would mean nobody has permission to make a fan sequel, let alone use lcddem's assets. Plus, it would kinda defeat the purpose of the whole 'forget my works existed' request.
Of course, you could do it anyway, and I doubt koronba would notice. It would be rude though.