Here is an overview of the game, via its Steam page:

About

Hello and welcome to Backfirewall_, a first-person tragicomic adventure set inside a smartphone. You are the update assistant. Solve wacky puzzles to counter the update and save the previous operating system from deletion. The fate of the System is in your hands!

~A tragicomedy in your smartphone.~

Press enter to update your smartphone…

>WAIT A NANOSECOND! I’m talking to you, update assistant!

>I’m OS9, the operating system of this phone, and I am not going to update. Help me stop it!

>Besides, not everything here is broken enough to be erased! Here, let me show you some awesome features of the system:

Key Features

• Clever Puzzles – Review terminal errors in RAM, party in the Speakers’ exclusive nightclub, navigate through the Wi-Fi bureaucracy, and explore other areas of a smartphone.
• Cheat-Codes to Manipulate the Environment – Hunt down or create bugs, trim binary trees, master music-controlled platforms, collect errors, and delete data using special cheat-codes.
• A Variety of App-Characters – Gossip with quirky pieces of software—the sassy Photos, the insecure Social Media F, or the neglected Health, among others—and uncover their distinct side stories.
• Numerous Collectibles – Collect emails scattered about to discover a parallel story of the mysterious phone User.
• Unproductive and Useless Humor – Enjoy meta satirical humor and breaking the fourth wall.

Watch the announcement trailer below.