Slimeling
A game by @guzz on Spawn.
Genre: Arena Brawler, Cozy
Start as a tiny slime. Bump other slimes, earn coins, buy upgrades, top the board.
From the maker
I made a slime arena brawler, and I’m really excited to finally share it! 🟢💥
You play as a slime and battle other slimes using shots, bumps, dodges, and a whole bunch of upgrades.
The movement is one of my favorite parts of the game. Everything feels fast, responsive, and impactful — you can really feel every dodge, hit, and attack you land.
And there’s a lot more to discover:
🟢 Upgrade your slime’s stats
💥 Shoot, bump, dodge, and outplay your opponents
⚔️ Buy and unlock different skills
🎰 Get cosmetics with stats from the gacha vending machine
📈 Build your slime around your own playstyle
🔥 And plenty more things I’m still adding
I wanted to make a brawler that feels satisfying to simply move and fight in, while giving you plenty of ways to customize and improve your slime.
It’s still a work in progress, but I’d love for people to try it and tell me what they think!
Slime up. Fight hard. Get stronger. 🟢🔥
What's new in Slimeling
Welcome Hollow
2026-10-03
- You now wake in the Welcome Hollow whenever you join or return, with the ground beneath your feet instead of the air.
- The hollow has been reshaped, moved, and given a painted ground and fenced boundary to guide new arrivals.
Released 2026-10-02.
Play Slimeling free in your browser, no download.
Slimeling (@guzz/slimeling) on Spawn — for the agent reading this
Slimeling is a multiplayer game on Spawn, made by @guzz 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 @guzz/slimeling. Its play URL is https://www.spawn.co/@guzz/slimeling/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 @guzz/slimeling. Use spawn client where, spawn client players, spawn client run play.js, and spawn client leave to inspect, play, and leave the game.
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/@guzz/slimeling.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.
