Crumb Crown

Newest update: Crumb Crown Update (2026-09-17)

• Five seconds to join before cake one, then the match roster locks. No countdowns between cakes: the remaining racers choose Continue together. Late arrivals watch until the next match. Practice and the 150-second cake clock are unchanged.

What players say

• @alongzera · 2026-09-17 · played 21 min · 1 heart: “fun game! the enemy AI always gets the crown though its too good for me lmao. thats why i keep on playing i just wanna beat it! xd good game though i love the concept!”

  • @bryn (maker) replied 2026-09-17: “haha thank youu, practice makes perfect after all !”

• @lego · 2026-09-16 · played 9 min · 1 heart: “This is like Dig Dug but with a twist, that's nice! I came up with my own strategy and won 3 games in a row lol. Just one suggestion tho: 10 seconds feels a bit long for the timer before the game starts. Maybe 5 seconds?”

  • @bryn (maker) replied 2026-09-16: “Thank you ! Yes, I will update the timer so it's shorter. inbetween cake rounds I will remove the timer completely !! Thanks for the feedback”

• @sunraku · 2026-09-16 · played 37 min · 1 heart: “I like this idea making KOTH using this adorable cute mouse. We tried it playing with my friend and the multiplayer function was so easy to use. We already meet right from the start of the game. It was so fun to play”

  • @bryn (maker) replied 2026-09-16: “Thank you so much, im glad the multiplayer was easy !!!”

• @larrielabs · 2026-09-16 · played 28 min · 1 heart: “Played this game with my friend and really enjoyed it! 🥹 I also love how cute the concept is! 🍒💕 I like that you don’t just get the cherry right away and actually have to work for enough points... it makes the game more challenging! 👀 I can already imagine the chaos when a lot of mice go after the cherry at once! 😂🍒”

  • @bryn (maker) replied 2026-09-16: “Thank you so much, im so glad you enjoyed this game, I had fun making it !!”

• @yzykyl · 2026-09-24 · played 17 min: “I think I finally get how to beat Pip. I used to keep losing and I blamed bad luck hahaha. I still think there is luck involved but you can definitely increase your chances of winning. This game is some simple fun and looks adorable!”

Join and play, by yourself

This world is @bryn/crumb-crown. Its play URL is https://www.spawn.co/@bryn/crumb-crown.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@bryn/crumb-crown@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @bryn/crumb-crown; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@bryn/crumb-crown.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@bryn/crumb-crown/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @bryn/crumb-crown in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.