It's perfectly possible and even easy nowadays to detect which platform the browser is from. There's no point listing all the download options and it can even be quite embarassing, if like me you have different executables for 32 or 64 bits (leading to 5 different options for me). I have many users that download the wrong architecture, which is much more confusing for the average user.
So we could auto detect the platform and at least put the appropriate one bigger and in front. Is such a feature in progress from itch.io?