I didn't manage to play a lot yet due to game breaking bug, but here is my current impression:
It's will be a fine game with some bug fixing and minor changes. It has AI pics, AI overworld sprites and little videos for game overs and some boss encounters, which is very good. The game has plenty fetish content as it should.
Apart from frequent bugs the text part can get mildly annoying since pressing space bar can only make text appear faster, but it doesn't skip to next part unless some time has passed, on the other hand the text proceeds by itself even if you don't press anything. Also due to lack of options menu you can't even change volume level, but it may be engine restriction, so i'm not sure. Videos are nice, but upbeat music breaks the immersion, like you are saving your friend from being eaten on a serious mood, then video with upbeat music, then we are back to serious mode. Also i have mixed feelings about using someone's animation for Nikusa.
In general, game is enjoyable, but is in dire need of bugfixing and playtesting.