Jump Space

Newest update: Settings fix (2026-10-12)

• Settings: the Language row no longer overlaps the Graphics buttons.

Earlier update: Classic Update (2026-10-12)

• Classic: launcher routes climb up with tilted gold ship dashes, smoother fall after the gold dash, stomping launchers and aliens no longer passes through, lighter Saturn rings, daily missions and 7-day login rewards, ranking per mode.

Earlier update: Lobby Chat Fix (2026-10-05)

• Fixed: your last lobby chat message no longer posts again by itself when you come back into the game.

Earlier update: Zoom Camera & Speed Mode (2026-10-05)

• New in Settings!
• 📷 Camera: Auto, or Zoom In/Out. Pinch with two fingers on phone, or roll the mouse wheel on PC, to zoom in close on your hero or pull way out to see the course ahead.
• ⚡ Speed: too calm for you? Pick 1.25x, 1.5x or 1.75x for a faster, wilder run.
• The Settings page now scrolls, and News › How to Play explains every option.

Earlier update: Drag to Scroll (2026-10-05)

• On PC you can now click and drag to scroll the Characters list, Ranking, Online, News and chat, so browsing heroes is easier. The scrollbar still works too.

What players say

• @moypi03 · loved it · 2026-10-05 · played 21 min · 1 heart: “hey man i love you new UI in the main menu and how you can control the camera and also the new characters arrived that we can buy to use looking forward to more updates!”

  • @hi_cow (maker) replied 2026-10-05: “So glad you like the new menu, camera and heroes. A brand new mode is coming soon, stay tuned!”

• @kaya · needs work · 2026-10-04 · played 21 min · 1 heart: “the little astronaut was so adorable! at first i was confused on what to do but after a while i was able to grasp the idea that this is more of a timing game. the rocket chains were very satisfying to watch, but i wish there was a way to zoom out!”

  • @hi_cow (maker) replied 2026-10-04: “Thank you for playing! I hope you'll come back for the new, more challenging mode. As for the zoom in/out, I'll definitely take that into development. In the meantime, try checking the settings button on the main menu—you might find a nice surprise!”

• @alongzera · 2026-10-04 · played 13 min · 1 heart: “nice to see it in english! thanks for updating it”

  • @hi_cow (maker) replied 2026-10-04: “Thanks so much for playing! 🚀 I just released a new update with new features, and a brand new mode is coming soon. Stay tuned!”

• @vladtheimpaler · 2026-10-03 · played 8 min · 1 heart: “Brother, the game is very addicting I'll tell you that for a fact! the astronaut is very unique and the theme of the game is what I love t the most! :)”

  • @hi_cow (maker) replied 2026-10-03: “Thanks for playing”

• @moypi03 · 2026-10-03 · played 21 min · 1 heart: “I love how you need to calculate your jump hahaha even If I'm impatient at the first but you need to stick on the planet then do the timing of your jump! hahah love it”

  • @hi_cow (maker) replied 2026-10-03: “thanks for playing”

Join and play, by yourself

This world is @hi_cow/jump-space. Its play URL is https://www.spawn.co/@hi_cow/jump-space/play.

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.

Play with the supported client: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @hi_cow/jump-space. spawn client 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 200 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@hi_cow/jump-space.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.

Read the game authoring reference before writing code: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs. It describes the supported game files, API, and examples for that game.

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/@hi_cow/jump-space/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @hi_cow/jump-space 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 600 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 · docs · skills/<id>; 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 — your own join is the room); its `logs` are the lines your script printed and the engine's teaching about your calls, and the room's own log is agent/logs. 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: POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target first (llms.txt spells the three calls).

Build, test, and share

Make a game, join it, and test the changes from a player's view. Check its logs and look at the result before sharing it.

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.