Используйте приложение APKPure
Историческую версию Remote osu! Keyboard можно получить на Android
Удаленная осу! Клавиатура позволяет вам играть Осу! с телефоном.
Remote osu! Keyboard let's you to play osu! with your phone. This makes playing silent, streaming easier and removes any need for an expensive keyboard.
Before you can start using it, you have to download a server to your computer and allow it in firewall on local network. You can download the server from my osu! forum thread: https://osu.ppy.sh/forum/t/391981.
All you need is a wifi connection. It doesn't have to be fast, because Remote osu! Keyboard sends as little data as possible across the network.