They have replied to a lot of comments on this thread.. You need to understand this is made by one person ( i assume) . If they are unwell then we have to accept that, we don't know what's going on with them personally, and its not our business to know. Nobody is asking you to sit around and wait for it. Play other games or try and make one yourself and you may realise its not so straight forward.
I am also eager to play future updates but if its at the expense of the creators health then I'm happy to wait. The creators personal life should always come before this.