Only the developers know what actually killed the game but from an outside prospective. It was going fine, then people (pulled in by the good art) complained that it was an NTR only game. Devs had to redo a lot of stuff to add non ntr options and somewhere along the line stopped talking to the artist. Artist leaves the game because of this. Devs out of respect or something decide to remake the game again without any of the original art instead but struggle to find a new artist. iirc they did find one but ended up stopping anyway. Sounds like its on the devs to me especially since they couldn't reconsile with the original artist. Had to be more than just radio silence because that is easily fixed by giving updates.