I Built a Multiplayer Typing Game in a Weekend and Wrote None of the Code

Sun, 20 Sep 2026 11:00:00 +0400

On Saturday I had a one-page idea for a game.

By Sunday it was live at keyboardwarriors.online with:

real-time matchmaking and private rooms
accounts, match history and a weekly leaderboard
seven fighters, six arenas, music and sound effects, all generated by code: no art files, no audio files
a pixel-art sprite editor, with an AI that checks every drawing before anyone else sees it
a marketplace with its own currency
an admin panel, an audit log, and a Discord announcer
an anti-cheat that listens to the rhythm of your typing
a logo

I wrote none of the code. I built it pair-programming with Claude Fable 5.1, Anthropic’s AI, in Claude Code. I made decisions, argued, playtested, pasted API keys, and lost a lot of typing duels.

I Taught My Computer to Play Tetris 99 by Lying to a Nintendo Switch

Sat, 19 Sep 2026 09:00:00 +0400

I play a lot of Tetris 99.

I am decent at it. I am not “win the lobby” decent.

So I had a perfectly reasonable thought:

What if my computer played it for me, on the real Switch, pressing the real buttons?

Three days later I had:

a robot that finishes in the top 10 against 98 real humans
an Arduino that introduces itself to Nintendo hardware under a false name
a Tetris coach that draws on top of my own live games
three confident theories about why things were broken, all of them wrong
soldered exactly three header pins, badly

This is the story, with drawings.

Ai on OmarAli dot Me

I Built a Multiplayer Typing Game in a Weekend and Wrote None of the Code

I Taught My Computer to Play Tetris 99 by Lying to a Nintendo Switch