Really appreciate the support, Mark, it's great that you enjoyed the demo! We'll be posting more regular devlogs and updates in the coming months to show our progress , so keep your eye on our blog and our Twitter if you want to follow along.
Sorry you had trouble saving the game though. That's a critical bug for sure, so we took a look at it right away, and luckily I think we found the problem. This appears to happen if you open the .DMG file and play the game directly from that location. While the game does start from there, it can't create the new files it needs for the save system to function.
To remedy this, open the .DMG file, and then open your Applications folder in a second Finder window. Then, take the HenchmanStory-Demo-mac file and drag it into the Applications folder. After a minute, the game should be ready to go, and saves should function properly as long as you open it from the Applications folder. You can then get rid of the original .DMG file to save space. We realize now that's not wholly intuitive, so for the final version, we'll look into creating MacOS installer that takes care of this for you. So thanks for pointing that out, and thanks again for checking out the game!