Exhibit No. 015 · Games

3D flying game with skyscrapers

The seed prompt of levelsio’s viral browser flight game. His version grew over many turns; this is a single answer to the first line.

Prompt

> make a 3d flying game in browser with skyscrapers

What it tests

Flight controls that feel right, a chase camera, a procedural city and a game loop with a goal.

Origin

@levelsio · 2025

1.6M views on the original post

Difficulty

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Results

Claude Opus 5.5

Run on 2026-10-19Open the raw answer

Test conditions

One attempt per test, with no edits after running. Where a first attempt didn’t work, the test was answered once more and the exhibit says so; answers that still don’t work are not shown. Run inside a Claude Code agent session, which includes its own system prompt, rather than the raw API.

All results for Claude Opus 5.5

Save the answer as a .html file and open it in a browser to compare it with the one above.