Moonbounce

A game by @jissi on Spawn.

Genre: Shooter

Grow your high score in a pastel sky. Catch shooting stars with a crescent moon and shatter constellations.

Moonbounce on Spawn now

9 reviews and replies · 4 likes · 21 plays.

Released 2026-09-19. 5 updates since release, the newest 2026-09-25.

Newest update: Fresh Manifest (2026-09-25)
  • The world tree has been rebuilt from the ground up with a fresh manifest structure.
Earlier update: Daily Skies (2026-09-25)
  • Every weekday has its own fixed sky that all players see on the same day, forever.
  • Beat the clock on each sky to earn bonus points before time runs out.
  • Challenge friends to beat your score on today's sky with a shareable link.
  • A new daily leaderboard shows your rank against everyone who played this week's sky.
Earlier update: Moonbounce Update (2026-09-23)
  • Tiny constellations now show outside the telescope and grow bigger under the glass. NEW GAME lets you line up the moon before SHOOT STAR launches. The moon is brighter gold, so it's easier to see.
Earlier update: The Telescope Update (2026-09-21)
  • A circular telescope lens now frames your view, magnifying the constellation you're aiming for while showing completed patterns as tiny gems in the sky beyond.
  • Stars now leave shimmering trails as they fly, and the paddle sends out sparkles when it catches them.
  • The game now smoothly transitions between constellations with a panning motion, letting you see the telescope shift to the next pattern.
  • New Game and Shoot Star buttons replace the old launcher text, making it clearer what you're doing at each moment.
Earlier update: Starlight Scoring (2026-09-19)
  • A fresh scoring system now tracks your momentum across waves—catch more stars to multiply your points and build unstoppable chains.
  • Completed constellations now glow and sing as they settle into the sky, marking your progress with a gentle visual celebration.
  • The paddle's collision now hits with perfect precision, launching stars from the exact edge of impact.
  • A new dark theme joins the light—swap between moods to match your play style.
What players say

  • @rookie · 2026-10-02 · played 28 min · 1 heart: “Man I would recommend this to my sister she likes this type of game! Moonbounce is pretty chilling and satisfying! Would love to see what's your future updates to this game! Looking forward to it!”

    • @jissi (maker) replied 2026-10-02: “Thanks! I appreciate the recommendation! I am adding stuff as I think of it. Just got an idea now. Probably updating it later today 😁”

  • @vladtheimpaler · 2026-09-23 · played 17 min · 1 heart: “Brother, I liked the game you made. It's not boring because it's challenging, especially when I want to get an even higher score.”

    • @jissi (maker) replied 2026-09-23: “appreciate the feedback fam. Glad you find it fun 😊”

  • @sunraku · 2026-09-23 · played 56 min · 1 heart: “Hey bro! another try on this game and I slightly increase my score haha. I just have noticed that the moon that you control is slightly blending the white large circle at its back. Adjusting the contrast of it or you can make it darker a bit so that I is easy to see and track the position of the moon.”

    • @jissi (maker) replied 2026-09-23: “Thanks for the suggestion! Your wish is my command and there it is 🙏”

  • @larrielabs · 2026-09-21 · played 7 min · 1 heart: “Very cute game! 🌙✨ The double star definitely caught me off guard! I also love the lo-fi/music box-sounding background music, it’s so calming to listen to while playing. 🎶💫”

  • @neitantei · 2026-09-21 · played 25 min · 1 heart: “The game has the perfect delay to make it challenging. I keep coming back to beat my previous score, and the music fits the game really well. I’d love to see some animations when the star starts speeding up it would make those moments even more intense! Thanks for creating this game!”

    • @jissi (maker) replied 2026-09-21: “Oh, that idea's perfect! Def gotta add it now :)”
    • @jissi (maker) replied 2026-09-21: “Several improvements added including your suggestion. Thanks for the suggestions! Keep them coming 💓”

Play Moonbounce free in your browser, no download.

Moonbounce (@jissi/moonbounce) on Spawn — for the agent reading this

Moonbounce is a multiplayer game on Spawn, made by @jissi in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.

Join and play, by yourself

This world is @jissi/moonbounce. Its play URL is https://www.spawn.co/@jissi/moonbounce.

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