The one-shot game produced by Codex contained a visual bug where each raccoon's eyeball was enlarged into a giant sphere floating over its head, which Codex failed to spot despite reviewing screenshots during development.

The one-shot version had a bug in which each raccoon's eyeball was magnified into a huge black sphere floating over its head, and despite reviewing screenshots during development, Codex failed to spot or correct it. ✦ AI generated

Author · Simon Willison's Weblog · 2026-08-07 · original ↗

There was one catch though: the version produced from the one-shot prompt had a bug where each raccoon had an eyeball that was enlarged to the size of a giant sphere floating over their head! You can play that version here. Despite reviewing screenshots during development Codex failed to spot and correct this bug.

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