Vibe Code Game Jam 2025

What it was

Pieter Levels (@levelsio on Twitter) ran the Vibe Code Game Jam as a
single-organizer event in July 2025. No company sponsor, no platform
hosting fee — just a Twitter announcement, a 7-day window, and a public
voting mechanic. By submission close, 1,170 entries had landed.

The constraint: build a single-player browser game using vibe coding
tools (Bolt, Lovable, Cursor, Claude Code, Replit, or Windsurf). Outputs
ranged from procedurally-generated dungeon crawlers to physics-puzzle
toys to text adventures with LLM-narrated story branches.

Why it mattered

Two things this event proved that no other hackathon had:

• One person can run a hackathon at scale. With audience reach (Levels'

Twitter following at the time was ~600K) and a clear constraint, you don't need Devpost or platform hosting. The entire event ran out of Levels' personal site + Twitter threads.

• Game jams are the perfect format for vibe coding tools. Small,

self-contained, no backend dependencies, easy to demo. Several of the top submissions were standalone games still playable today as static-site links.

Format details

• Duration: 7 days
• Submission: post your game URL in a Twitter thread
• Judging: public voting via Twitter likes + a small panel of

invited judges

• Categories: most fun, best vibe, most innovative use of AI, plus a

community-pick winner

Why it's worth studying as an organizer

If you want to run a vibe coding hackathon with no budget, the Levels
template is the cheapest known viable approach. The cost was approximately
zero; the result was 1,170 working browser games shipped in a week.

Sources

• Indie Hackers post — Pieter Levels announces winners
• @levelsio on Twitter