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.io · Action · made with GPT

JellyBlob

Grow a wobbly jelly, trap rivals with your trail and go Supernova in a shared pond.

Plays in your browser Phone friendly Online multiplayer
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JellyBlob cover image Play on jellyblob.win ↗ Opens on the creator's site. Come back here to rate it.
Open on the creator's site ↗

About JellyBlob

JellyBlob is a free multiplayer .io arena where you play a wobbly gelatin jelly in a glowing night pond. You grow by eating dew, cut rivals off with your trail, hop over theirs and stomp jellies smaller than you. Shedding size lets you surge for a burst of speed, and a full Glow meter sets off Supernova: seven seconds of swallowing anything smaller.

Pond events break up each match every few minutes, from a Dew Storm to a fleeing Golden Jelly. Between runs there is a long progression: endless levels with rank badges, a Reward Road, daily quests and a weekly challenge, plus hats, faces, trails and emotes to collect. It plays on phones as well as desktops, with touch controls for both orientations.

According to its creator, AI wrote all of the code over hundreds of rounds of instructions and feedback: first GPT-6 Astra in Codex, then a remake with Claude Opus 5.5 in Claude Code. The remake runs on Three.js with its own game server, and it renders each jelly as squashy, see-through gelatin.

How it was made

All of the code was written by AI. Source: The creator's own statement.

Evidence: the creator's own account.

AI provider
OpenAI, Anthropic
AI tools
Codex, Claude Code
Engine
Three.js
Genre
.io, Action
Players
Online multiplayer

AI wrote all of the code, with hundreds of iterations from my input and instructions. Initially made with GPT-6 Astra in Codex, then remade with Claude Opus 5.5 in Claude Code.

— Kvickan
Make one like itCodex game development: a practical guide

Controls

  • Mouse, WASD or arrow keys to steer
  • Click or Space to hop
  • Hold click, Shift or right mouse to surge
  • Keys 1–4 for emotes
  • Touch: drag to steer, HOP and SURGE buttons

Screenshots

  • JellyBlob screenshot 1

Questions about JellyBlob

Is JellyBlob free to play?

Yes. JellyBlob runs in your web browser at no cost, with no download or account needed.

Which AI was used to make JellyBlob?

JellyBlob was made with Codex, Claude Code, GPT-6 Astra, and Claude Opus 5.5. All of the code was written by AI, according to the creator's own statement.

Can I play JellyBlob on my phone?

Yes. JellyBlob supports mobile browsers.

Who made JellyBlob?

JellyBlob was made by Kvickan. See their profile on GamesByAI for their other games.

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