unfortunately Cattle Castle does not work well on the itch.io app, please try to download from the site and let me know if it works.
If you'd like to make your game installable through the Itch desktop app, you can tick the relevant operating system boxes in the project editor that are next to each file. (labeling the files as something other than an executable would also make them downloadable if I'm remembering correctly, but that wouldn't be the best method here)