I've completed the implementation of Steam Cloud Saves and submitted a first version of the demo for review ... BUT I noticed that I cannot publish it until the end of the month because of one of Steam's rules. So, yeah, that will take a few more days. On the positive side: there is plenty of time for me to fix my upload in case it didn't work. (It was the first time I've uploaded something to Steam.)
The next items on my to-do list are achievements and statistics. And on July 13, Valve is organising a zoom call about the October Steam Next Fest.
By the way, fun fact: "Icosido" is also the name of a music piece for carillon by Julie Zhu. Check out her TEDx talk!