Also, consider just calling it "Reynard-linux" or something, without a version number in the file, so that the Itch app will automatically update me to the next version by selecting the file with the same name.
Hey aaronfranke, I'll be sure to add the support to itch app soon (probably in the next update). Thank you for your suggestions :D
Hey there! I've uploaded it as a .zip file and gave it a "generic" name. Hope that it helps :)