That might be because I use an external link for the game (the file is hosted on Mega). Does it work if you try to download it through a browser?
Viewing post in Caliross, The Shapeshifter's Legacy comments
I added another link by uploading a copy of the game on itch.io, to confirm if the problem was not having the file hosted on itch.io. Having to upload the file twice might be a bit of a waste, but I share the link even outside of itch.io (in fact, most of my audience comes from elsewhere), so I can't drop the external link.