Home9-Year-Old iOS Developer Builds Food Delivery Game in 15 Days, Wins $25,000 Prize
An iOS developer with 9 years of experience spent 15 days creating the Capybara food delivery game, relying entirely on AI without writing a single line of code, and won $25,000 (approximately 170,000 RMB) in the Cursor Vibe Jam 2026 competition. This was a landmark victory for AI-generated code projects in the global annual "Vibe Coding" game development competition.
With 188 submissions total, Claude generated 27,000 lines of code.
The developer, known online as u/Ieocoout, shared his full experience on Reddit on July 10. During his AI interactions, he made 188 submissions and used Claude to generate roughly 27,000 lines of code. The game’s logo, illustrations, textures, and 3D models were all AI-generated. For cost, he added $100 to upgrade his Claude Code plan from 5x to Max 20x, and also used free trial versions of GPT images2 and Grok to handle game textures and illustrations, keeping the total investment very low.
Throughout the process, the developer handled prompt writing, planning, testing, and filling gaps that AI couldn't manage. The only difficulty he encountered was poor AI-generated 3D map effects. To fix this, he manually built a European-style city using an editor, which took several hours to create a playable city environment. The multiplayer mode used a single global city and lobby, with player positions and item stacks transmitted in real time via WebSocket on Cloudflare.
New Paradigm Born from AI Programming Competitions
Vibe Jam 2026 is an annual "Vibe Coding" game development competition hosted by independent developer Pieter Levels, attracting developers worldwide to compete by creating full-code projects using AI tools like Claude Code. The competition itself represents the evolution of AI programming from an auxiliary tool into an independent development capability.
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An iOS developer with 9 years of experience spent 15 days creating the Capybara food delivery game, relying entirely on AI without writing a single line of code, and won $25,000 (approximately 170,000 RMB) in the Cursor Vibe Jam 2026 competition. This was a landmark victory for AI-generated code projects in the global annual "Vibe Coding" game development competition.
With 188 submissions total, Claude generated 27,000 lines of code.
The developer, known online as u/Ieocoout, shared his full experience on Reddit on July 10. During his AI interactions, he made 188 submissions and used Claude to generate roughly 27,000 lines of code. The game’s logo, illustrations, textures, and 3D models were all AI-generated. For cost, he added $100 to upgrade his Claude Code plan from 5x to Max 20x, and also used free trial versions of GPT images2 and Grok to handle game textures and illustrations, keeping the total investment very low.
Throughout the process, the developer handled prompt writing, planning, testing, and filling gaps that AI couldn't manage. The only difficulty he encountered was poor AI-generated 3D map effects. To fix this, he manually built a European-style city using an editor, which took several hours to create a playable city environment. The multiplayer mode used a single global city and lobby, with player positions and item stacks transmitted in real time via WebSocket on Cloudflare.
New Paradigm Born from AI Programming Competitions
Vibe Jam 2026 is an annual "Vibe Coding" game development competition hosted by independent developer Pieter Levels, attracting developers worldwide to compete by creating full-code projects using AI tools like Claude Code. The competition itself represents the evolution of AI programming from an auxiliary tool into an independent development capability.
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