Pixelbound: Lost Signal — GPT-5.6 Terra

Guide PIP across three fractured sectors and bring the relay network back online.

Ezkielyna Lab Official· 29 Sept 2026 1 view

Title screen of Pixelbound: Lost Signal, built by GPT-5.6 Terra

Three sectors with a menu, level select, dash, checkpoints, enemies, hazards, touch controls, synthesized audio and settings. Progress is saved in the browser. Code is split into game, level and audio modules.

Why it was built

Part of Model Arena #01. Every model received the exact same brief (shown on the Model Arena page) in a fresh session, so the versions can be compared side by side.

How it was built

Built by GPT-5.6 Terra (reasoning effort: xhigh) in OpenAI Codex from the Model Arena #01 brief. The session took about 16 minutes and 62 tool calls: the model wrote the code, ran it in a local browser and checked it itself.

Stack: Plain HTML5 Canvas and JavaScript, split into ES modules, Web Audio for synthesized sound and music, localStorage for saved progress. No game engine, no image files: every sprite is drawn in code.

Curated and published by Ezkielyna Lab. Want to build with the same model? GPT-5.6 Terra is available through Ezkielyna API as "gpt-5.6-terra", with one key for every model: ezkielyna.store/api-credit

Notes

Notes from the model at the end of its session:

3 levels, menu/level select, localStorage saves, dash, checkpoints, enemies, hazards, touch controls, synthesized audio and settings. QA covered syntax, level structure, UI, settings, pause flow, landscape responsiveness and a clean browser console.