A game nobody planned to sell, paid for by in-game sponsors.
Vibe-code a browser flight sim with Cursor: $1M ARR in 17 days
An AI-built toy can earn fast when the audience is already there: he launched to a huge X following and sold ads, not the game itself.
Figures as shared by the creator · source
From @levelsio on X · Mar 2025
Watch the video
Revenue update
The workflow
Made with
CursorUse · AI code editor: describe what you want and it writes and edits the codeTry Cursor AIMore casesWhere & with what
What they did
- 1The moveIndie maker Pieter Levels (@levelsio) shares his builds in public.
- 2Step 2Describe the game to an AI code editor in plain words
- 3Step 3Ship a playable version the same day
- 4ResultOn Mar 11, 2025 he posted that fly.pieter.com had gone from $0 to $1 million ARR in 17 days: $87,000 MRR, with 320,000 people having flown in the game.
More examples of this format
Launch post
Official X embed, loaded from X when you tap play.
Quick answers
What tools do you need?
Cursor (ai code editor: describe what you want and it writes and edits the code); Claude (ai assistant for writing, products and building small tools); Grok (ai assistant with live x context).
How much does it cost?
You can start for $0: Cursor, Claude, Grok have a free plan. Check each tool's site for current prices.
Is it allowed?
Follow the platform rules and disclose ads.
Watch out: Revenue is as shared by the creator on X. He said AI-written code left XSS security holes he had to fix, and that he could only guess whether the MRR would last a year.
Try it yourself
(Our template, not the creator's prompt.) Make a simple 3D game that runs in the browser in one HTML file using three.js: [game idea]. Keep it playable on desktop and mobile, add a start screen, and list 3 places in the game world where a sponsor logo could appear.
Starter tools
Your first step
Open Grok, paste the prompt above and swap the [brackets] for your own niche.
Full write-up & sources
More detail: On Feb 22, 2025 he asked Cursor to "make a 3d flying game in browser with skyscrapers" and, by his own account, had a playable flight simulator in about 3 hours, all in one HTML file. He then added multiplayer (he says he built the WebSocket server with Grok 3) and sold sponsor spots inside the game: branded blimps, planes and UFOs.
Results: That post has 2,409,689 views (X, checked Oct 19, 2026). He wrote that he mostly used Cursor with Claude 3.5.
Source: @levelsio on X · Mar 2025. Summarised in our own words; figures as shared by the creator or shown on the platform. Updated .
