People constantly nagging him over this is prooobably why he's started doing RPs with his contributors instead of working on the game itself. I've been in a few group chat's with them... while Kita hasn't said much, the others don't think very highly of the constant demand for updates or the community on here. At worst they're pretty viscious, at best this place is a the butt of a few jokes.
That being said, the game hasn't stopped (I've read beta versions of a few of the new scenes), but it's definitely fallen on the "priority ladder" of "fun hobbies" from the sounds of it. Why sit around and write constant smut scenes for an unpleaseable audience when you can spend some time with real friends and good writers and produce something a bit... deeper?
...Whelp. Now I'm depressed.
See, I understand exactly where you (and by extension, he) are coming from, and I even agree. I've tried my best not to post unless I have something to say, and to go out of my way to not nag and nag about hey man, when's the next update coming up? 'Cause, ya know, he's not my personal courtly h-game creator or anything.
But that also puts me in the position of having nothing to contribute either, and that means that I'm just as useless as all the people who do. Even if I'm not whining, even if I'm just patiently waiting, it still puts me in the position of wondering what I can do to help, and concluding the answer is absolutely nothing.