itch.io

If you extract the files it'll just download the photos, animations, models, expressions and backgrounds to your internal storage. It won't let you play the actual game.

Instead, you should download JOIPlay and download it there before opening the ZIP file (it only works with un-extracted files). From what I've seen it'll still put all the mentioned things in your internal storage but at least you'll have the playable game inside the app.