Yeah I remember you advertising this on IF Hub.
No feedback on the actual game since I haven't played it, but glad to see more people going full tilt on the dark overlord protagonist concept.
(And now you got one responsive post on here at least, which is already one more than you got at IF Hub)
I mean some would say I write nothing but villain protagonists. (Not entirely true, but I do tend write a lot of them)
Anyway, just look through my profile of stories here and you'll see. Major ones focusing on villain protagonists in a fantasy setting would be Eternal, Necromancer, Rogues and The Pure, The Vile and the Deadly.
Though there's other stories of mine that have them in a scifi or modern setting as well.