Not a game bug but still, just purchased and cannot download the file from the confirmation page or the email.  Nothing happens from the confirmation page and the email says: 

This site can’t be reached

click.pstmrk.it refused to connect.

Try:

• Checking the connection
• Checking the proxy and the firewall

ERR_CONNECTION_REFUSED

From itch? Dunno, thats out of my scope. I would contact itch and pretty much what you posted here. Have no control over the downloads or itch itself. Pretty much all I can do is add pages, upload games, and set it up with graphics and text, or similar things like that.