Hey! Thanks for reporting these zipping problems! We're currently already aware of the issue (which seems to be a very-specific issue between the combined Mac setup, the zipping system we use for our builds, and Itch.io's build system) and are actively looking into it. At the moment, since we're busy with other tasks, I can't give you exactly a timeline when the issue will get fully fixed, but we'll be looking into it soon!
I don't know if you were able to get the builds running since you unzipped from the terminal, but if you want, I can provide you the Mac builds of both games privately if you need. 🙇