Well it turns out the my tentative release dates were slightly optimistic... now I'm looking at 29th May 2020 for Stomping Boots, hopefully, and for Dark Side... I'm not sure. I've come to realise that I really should update it to the latest version of AGS, and should probably use the opportunity to get some practice in of coding Steam Achievements. Obviously this means putting the release date back a bit, I'll have a think about it and post an update when I've come closer to a final decision on this.
But rest assured, but games WILL be coming to Steam! :-D