fly.pieter.com

About

fly.pieter.com is a free multiplayer flight simulator that runs in a browser tab. You type a name, pick a plane and you are in the sky with whoever else is online, dogfighting, chasing missions or just cruising over a blocky low-poly world. There is nothing to install and no multi-gigabyte update before you can play, which makes it a good pick for a quick session with friends or for anyone curious about what a browser game built mostly by AI looks like. It is the project that turned vibe coding into a public spectacle. In February 2025 the indie maker Pieter Levels (@levelsio) asked the AI editor Cursor to "make a 3d flying game in browser with skyscrapers" and kept iterating in public on X, in vanilla HTML and JavaScript with Three.js. The site itself still credits it as "by @levelsio + Cursor + ThreeJS" and "100% made with AI". Within two weeks Levels was reporting more than 20,000 players on a record day and $67,000 in monthly recurring revenue from in-game sponsor ads, such as branded blimps and billboards. The game's success led him to start the Vibe Jam, the yearly game jam for AI-made games. Highlights: • Massively multiplayer: everyone online shares the same sky • Free Cessna 172 and Cyberpink planes, each with its own speed, ceiling and firepower • Dogfighting, plus missions like shooting down balloons, downing other planes and flying to space • Rear-view mirror for when someone is on your tail • Instant start in the browser, no download and no loading screens • Live flight radar of current players at pieteratc.com • Built-in board for suggesting ideas and reporting bugs The game is free to play in any modern desktop browser. An optional F-16 jet is sold on the site for US$29.99, and companies can buy in-game ad slots. There are no subscriptions. It is not open source.

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