Sorry for the delay in replying. I didn't see your question here before.
Actually, because of the maximum download size limitation that Android imposes, this link on the page is to an application that downloads the game. That's why it's smaller. It's not a patch, it's the app that downloads the game on Android.
But maybe you'll get an error message now because the download quota on the server has been exceeded due to too many downloads. I'm working on it.