Pieter Levels' single-organizer game jam in summer 2025 drew 1,170 submissions — proving that one solo operator with a Twitter following can run a hackathon at scale. The format: build a single-player browser game using AI coding tools in 7 days.
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
Sponsors
- Pieter Levels (self-funded)