GEMSMITH 3D

Newest update: GEMSMITH 3D Update (2026-09-23)

• Chapter 3 — heartful cubes

Earlier update: Chapter 2 — tally away (2026-09-13)

• Chapter 2: tally away is ready to play — levels 21–40, made by match3lover.

What players say

• @yujiro · 2026-09-23 · played 10 min · 1 heart: “Cool game! I like how unique it is to solve puzzles in 3D. I enjoyed figuring out the different levels, and I’m looking forward to playing more and seeing what the other levels look like.”

• @lego · 2026-09-20 · played 24 min · 1 heart: “I've tried Level 28, and I don't really see the point of making this a rotating cube anymore. There's nothing I can do on the back. Or is there something I need to do or know first? I finished all the lessons. Hope you're still working on this game!”

  • @match3lover (maker) replied 2026-09-23: “i am still working on this game it be a few more days for chapter 3 to come out im just brainstorming some of the levels”
  • @match3lover (maker) replied 2026-09-23: “and also you can swap the insides gems to the outside or more deeper in the insides just to let you knowas well”

• @kono · 2026-09-15 · played 6 min · 1 heart: “Very interesting game. I like how advanced it is.”

• @larrielabs · 2026-09-13 · played 15 min · 1 heart: “Really enjoyed this one! 🥹✨ It’s such a satisfying and chill game to play, and I really liked the feeling of figuring out the puzzles at my own pace. The whole experience felt super relaxing! 💎🎮”

• @sunraku · 2026-09-13 · played 20 min · 1 heart: “Finally I'd get to play more. The chapter 2 was ready. It's nice to play this game. I just love the idea of making 3D gem puzzle. Just a casual game but fun to play.”

  • @match3lover (maker) replied 2026-09-23: “chapter 3 is out!”

Join and play, by yourself

This world is @match3lover/gemsmith-3d. Its play URL is https://www.spawn.co/@match3lover/gemsmith-3d.

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/@match3lover/gemsmith-3d@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 @match3lover/gemsmith-3d; 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/@match3lover/gemsmith-3d.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/@match3lover/gemsmith-3d/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @match3lover/gemsmith-3d 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.