Currently the builds aren't tagged for mac/windows/linux so the itch.io client doesn't know what to do with them. Any chance you could add those so it works?
There is, itch's front page has a link to it. I'm not going to link it directly because spambots are a thing.
I don't know what the creator backend looks like, but as long as the download for windows is listed as being for windows, etc. it should work. Flora and Sauna is a game that does this.
