uuuuh. I can download it just fine and zip files usually are the packaging method for uploading it. The person must have one of these problems:
- Bad internet
- They have an anti-virus that's blocking the download bc it thinks it's a virus
- They don't know how to open up the zip file i guess.
So it's not something that's your fault. But there is a website where you can upload your game into an HTML game, but it will be outside of your itch.io account. Renpy doesn't have an option to make a browser VN.
This is the site where several, some of them very popular, VNs were uploaded for browser play.