I'm playing the downloaded file on Android and guys you don't even need joiplay to run this, or any other HTML games. I just use file explorer plus which is an app everyone should be using anyway since it's way more capable and gives you way more control than Google files, it runs better on weak hardware too. That app lets you run any html file on any browser of your choosing through a local server, literally no hassle at all, seamless, all the pictures and everything work just fine too. You don't even need to unzip the files, though it does help with stability.