This is still my full time job. Working on a game alone is just very slow going, especially when you're like me and truly did get in a bit over your head in the first place. There's going to be a hell of a postmortem one day. The number of mistakes, shakeups, and even a couple of restarts is pretty staggering. Hollow Knight being as good and as successful as it has been definitely made me re-examine things a bit to make sure the game is what it needs to be.
In the short term, I'm going to update the beta client on Steam to a newer version that has more recent features and we'll also note differences in content as well. The reason I'm doing this isn't just to signal to people that I'm still alive, but to get vital data and feedback about the state of the game. The project has been built around a small, lesser known engine that was never designed for anything of this scope, and there are still some concerns around technical performance that I need more information on.
As for when I'm updating the demo -- It's been ready content-wise. I'm just waiting for a few fixes to the engine itself... To get some things working I had to update to a new beta version of the engine (some weeks ago) which in turn broke some core features and I'm still waiting on a solution from the proprietors before I can expose it to the public (specifically, there are serious bugs with gamepads and a few other things that would make it not fun to play).
I'm happy to answer any more questions anyone has -- or just listen to your complaints, which, if you backed, are valid complaints. I'm willing to admit my personal failures but I can say with 100% certainty that I'm never stopping until we have a good final product.
In the mean time,
I update my twitter as regularly as I can. I try to keep extraneous tweets to a minimum and the majority of my tweets are gifs or images related to the game.