Uh I'll answer a few, while eating fried pipis 😊
Quite long? Hard to say for sure, but with how slow the overall characters developing and relationships go, at least 10 episodes/updates.
Can't say for sure, I'd love to continue making VNs in future, but it will also be my job, so if it can't also financially keep me upright, then any VN continuations will be impossible.
Eternum! Sicae(LCC)! Ripples! That's a few favorites of mine.
Yes I was sad as fuck, and I told Cari (dev of Eternum) multiple times that Chang needs to now fall from some stairs inside Fates.
Summers Gone/Ripples aren't fully harem and look great graphically.