itch.io

I feel like you're not opening it with the right program... sometimes Itch decides to package the APK as a ZIP file. Are you unzipping before you attempt to install?

usually it'll do that if you don't have enough excess space to install it, usually you can get away with installing two different versions at once and then deleting the older version after the latest is installed just have to make sure that you go into the game first before you delete the old version but also that has to do with APK files rather than a zip file