Hi, I’m not really an expert on android, but what worked for me is you will need to manually access your phones files which means you might need to install some sort of file explorer app, and then you should be able to install it. Some phones might have a hissy fit for trying to install a non-trusted or non-official app but I don’t know for sure. Good luck!
Well, the game runs pretty poorly on a modern phone like the one I have, so an older phone might struggle badly. I have no idea how to install on older android 6. The game is made with gDevelop, so you could look with them if there is a way to do it etc. Next version won’t be having an android release as I’ve decided it’s best for me and my game to not develop for phones in the future.