FilthySloth provided an interesting version of the "Demon / Succubus" plot device, rendered with a fresh and unique art style and a great eye for detail. His characters are attractive and engaging, with distinct personality development; and he has a dry sense of humor that permeates the game with clever dialogue, subtle sight gags, and "Hey you - Yes, YOU - on the keyboard" Player prompts.
So I sincerely doubt that anyone other than THE FilthySloth could continue this project, and I share the sadness expressed by many others, while remaining grateful that I've been able to play through multiple times, have copies on 3 PC's, and have a copy saved to my "Financials / Life Stuff" archive . . . so Thank You, FilthySloth.
Sappy gratitude stuff aside: I also fervently hope that your Creative Muse bites you so freakin' hard and and keeps gnawing at you until you no choice but to continue where you left off. Meantime - I hope life is treating you well.