Submissions open from 2026-09-25 16:00:00 to 2026-09-28 16:00:00
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No theme, just a fun little box to build in.

One playful constraint drops at launch and sticks around for the whole jam. No twists, no surprises after that. A cozy little jam from the makers of the Setfire Twist Jam.

Come hang out on Discord
Your little box is… A secret, for now

The constraint stays under wraps until the jam kicks off. Once it drops, it applies to your whole game, no exceptions, and it's the only rule you get for all 72 hours.

The basics

72 hours Friday evening to Monday evening.
Solo or up to 4 Bring friends, or find some in the Discord.
Plays in browser Any engine, as long as it fits in the box.

How games are rated

1 Creativity Did the limit spark something nobody expected? The best answers are usually the odd ones.
2 Craft How it feels to play. Tidy, readable, nice to hold.
3 Charm Personality that survives the limit.

Everyone who enters votes, all three count the same.

Rules & how to join

Does the constraint really apply to everything?

Yep, the whole zipped build, fonts and audio and engine included.

Can I start before the jam opens?

Plan and sketch all you like. Game code starts at launch. Reusable engines and libraries you already had are totally fine.

I've never finished a jam game. Should I enter?

Please do. A tiny box is a friendly place to start, and a game that just runs is a perfectly good submission.

Can I use AI-generated assets?

Sure, just mention it on your submission page. Generated assets tend to take up more space, so keep that in mind.

How do I actually join?

Hit Join the jam, build something inside the limit, upload a browser build before the deadline, then play and rate ten other entries. That's it.

Kindling Jam, a little jam from Setfire Entertainment.
Small fires start somewhere.