Instead of uploading installer files, can you please upload a portable Linux verison for use with the Itch app? Just upload a ZIP, the Itch app will handle extracting and launching. Also, please mark this portable version as "Linux" and unmark the installer files so that the Itch app knows what to download. See: https://itch.io/docs/itch/integrating/quickstart.html and https://itch.io/app