Is not left 4 dead, the author is bussy with different projects that is developing at the same time, not to mention his studies. The recent status updates are via patreon or suscribe star, at the moment he's working on "tiny vore pets (that the main oficial protag is Sabrina)", "vore defense" and some big animations and updates for this game. So in essence maybe in a few weeks he'll release an update. But yeah in resume he post his advances in Patreon and suscribe star every month or so.