Where does it go wrong? Can you not click on this link and see the sale? I've added a password now that might solve it. If you get a prompt for a password, type in v7 and see if it works.
I see it fine but when clicking on the button, I get a pop-up message from Itch in my browser saying, "You don't have permission to view load this project, ask the developer to check the visibility settings."
