Third-party jam · Not run by Summer Engine
2026 Vibe Coding Game Jam (#vibejam)
Organized by Pieter Levels (@levelsio). Sponsored by Bolt.new and Cursor (@cursor_ai).
Start: . Deadline: (roughly one month to make your game).
Source: original X post
Entering with Summer Engine
Recommended setup for Vibe Jam: start a fresh projectand keep the game GDScript-only so it can export to the web.
It's easy to make your game in Summer Engine. If you want a browser-playable jam entry, keep the project GDScript-only.
The short version: export the web build in Summer Engine, then check it runs in the browsers the jam requires.
Cash prizes
- Gold: $20,000
- Silver: $10,000
- Bronze: $5,000
Rules (from the host)
- Anyone can enter with their game.
- At least 90% of code must be written by AI.
- Project must be started on or after the jam start; do not submit old games.
- Game must be on the web, free to play, with no login or signup. Own domain or subdomain is preferred.
- Multiplayer is preferred but not required.
- Any engine is allowed; Three.js is often recommended.
- Avoid heavy downloads and long loading: the game should be almost instantly playable (a username prompt is OK if you want it).
- Add the HTML snippet on the Google Form (as instructed there) so you show up as an entrant.
- One entry per person — focus on one strong game.
Suggested tools
Host suggests Cursor Composer 3 and Bolt.new as fast, affordable options that work well with Three.js and games.
Jury
Pieter Levels (@levelsio), @s13k_, plus additional game dev and AI people the host invites. Check the host's post for the latest list.
Web export guide for Summer Engine
This jam needs a browser build. Here is the clearest path today if you want to make the game in Summer Engine and submit it to Vibe Jam:
- Use GDScript for a web-eligible project. In Godot 4, projects that use C# cannot export to the web (upstream limitation, still true in Summer). A GDScript-only game can export to the web.
- Export the web build in Summer Engine. Since engine 0.7 the editor ships Summer's web export template (WebGPU, Forward+ or Mobile renderer). The web build is a standard static .zip with index.html at the root.
- Publish the build and check it. You can publish the .zip on Summer Games, where people play it in the browser. Before you submit, check the game runs in the browsers the jam requires.
If anything here conflicts with the official form, the Google Form and host post win.
Need help exporting?
When you're ready to export, it usually takes about 5-10 minutes. If you get stuck, DM @mathias-heide on Discord or email founders@summerengine.com.P.S. I'm joining too and making a game.
Disclaimer: Summer Engine is not hosting or organizing this jam. The Vibe Coding Game Jam is run by Pieter Levels / levelsio with sponsors including Cursor and Bolt.new. We're linking it here because you can make your game in Summer Engine and submit it through the official form above. For the canonical announcement, see the original X post.