This is the APK game file so you just need to download and install and open it.

Link Download game: There are many versions here for you. I will constantly update (with short droplink link):

• Demon Slayer Mugen Android~189MB – DOWNLOAD
• Demon Slayer Mugen Android~312MB – DOWNLOAD
• Demon Slayer Mugen Android~318MB – DOWNLOAD
• Demon Slayer Mugen Android~346MB – DOWNLOAD
• Demon Slayer Mugen Android~384MB – DOWNLOAD
• Demon Slayer Mugen Android~408MB – DOWNLOAD
• Demon Slayer Mugen Android Terbaru Mantap Terbaik~433MB – DOWNLOA
• Download Demon Slayer Mugen Android~458MB – DOWNLOAD
• Download Demon Slayer Mugen Android~499MB – DOWNLOAD

Video Tutorials Over the DropLink link to get the download link: