I will look up Chris Zukowski.
I'm sure it is far too late for me to get much out of mailing lists. I dropped off the social media radar years ago. At the moment I have the Horace Hagfish demo up here and on itch.io. Occasionally I comment on reddit and leave a link to the demo if it is relevant to the discussion. This doesn't lead to a lot of traffic as you'd imagine!
Horace is actually finished. I'm currently wrestling with making my steam page and a video (I have zero video editing experience). I also have a lot of anxiety about launching and being "officially finished" even though I'm eager to work on the next project.
In total the game has 50 levels with a pretty smooth difficulty ramp and new puzzle elements introduced every few levels.
I think I had slightly different roadblocks than you. For me the jump from design to production was very stressful. Then I ended up redesigning most of the puzzle elements halfway through as I felt I wasn't capitalizing on the color mixing core.
Developing another adventure game might go a lot faster a second time around. You've got the experience and I'm sure a lot of your code is reusable.