Indie game storeFree gamesFun gamesHorror games
Game developmentAssetsComics
SalesBundles
Jobs
Tags

My game has separate packages for 32-bit and 64-bit Linux distributions. Currently Itch app always installs the 32-bit version, even on 64-bit Linux.

Does the Itch app simply install the first Linux package it sees or is there some logic to determine the correct one?

There is no special 32/64-bit logic for now, I opted against adding heuristics for that and rather, wait for backend support instead to properly tag builds.