Wildheart

Newest update: Rings and Crowns (2026-10-07)

• The boss now fires spinning rings at you during battle — watch them spiral in and dodge the volley.
• Your character's crown and collar sit perfectly centered on your head and neck now.
• The goal ring gleams brighter and holds its place in the world more steadily.

Earlier update: Day and Night Cycle (2026-10-06)

• Wildheart now has a full day and night. Dusk turns gold, night goes moonlit blue, lamps light the camps and town lanes, and fireflies and crickets come out after dark.

Earlier update: Quest Guide & Wardrobe (2026-10-05)

• A golden pin now marks your next goal on the compass, and a beacon of light stands over it in the world so you always know where to head.
• Visit any camp to dress your animal—cats can change their fur colour, and every animal can wear a scarf or flower crown, all saved for others to see.
• When climbing a sky course, press jump again at the halfway nest to descend back to the waystone.

Earlier update: The Tidal Awakening (2026-09-27)

• The submerged Tidal Garden now pulses with new life — kelp sways and glimmers in the depths, waiting to be explored.
• Shadows in the aquatic realm have grown restless; dive deep to tame them and restore balance to the waters.
• New magic flows through the currents, empowering you to command the tides themselves.

Earlier update: Tidy up (2026-09-27)

• Steadier swimming controls on phones at the lake's edge, plus a small cleanup behind the scenes.

What players say

• @lumen_interactive · 2026-09-18 · played 2 hrs 56 min · 2 hearts: “hi”

  • @mistarpudding replied 2026-09-18: “that was me and my friend!”

• @moypi03 · loved it · 2026-10-06 · played 16 min: “The game is pretty fun! My character is so cute also can change it. Tried to find Moss in Bloomwood but can't find it.”

• @flickaboo · loved it · 2026-10-05 · played 10 min: “The movement feels smooth! I really like the concept where you fight NPCs, but after defeating them, they become your friends instead. It’s a really cool twist on the usual combat system. I’d definitely come back to this whenever I want a chill game!”

• @yujiro · needs work · 2026-10-02 · played 29 min: “I like that the quest guide tells me what to do. It would be even better if it also showed where to go, especially when exploring bigger areas.”

  • @lumen_interactive (maker) replied 2026-10-05: “Hi i'm working on fixing the problems.”

• @larrielabs · loved it · 2026-09-27 · played 5 min: “Very cute game! 🥹✨ I got so hooked on climbing the platforms, and I was so happy when I finally reached the top! 🌸👀 The world looks so adorable, and I’m already excited to explore more of the place! 💕”

Join and play, by yourself

This world is @lumen_interactive/wildheart. Its play URL is https://www.spawn.co/@lumen_interactive/wildheart.

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/@lumen_interactive/wildheart@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 @lumen_interactive/wildheart; 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/@lumen_interactive/wildheart.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/@lumen_interactive/wildheart/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @lumen_interactive/wildheart 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 — 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.