Exhibit No. 010 · Games

Flappy Bird in one file

Build a complete, playable Flappy Bird from a single sentence.

Prompt

> Create a complete, playable Flappy Bird game in a single HTML file.

What it tests

Game loop, input handling, collision detection and whether the result actually feels playable.

Origin

Community classic (one-prompt comparisons by soikat.dev)

Prompt wording adapted from the original.

Difficulty

●●●

Results

Verdicts are our own assessment of each answer.

Claude Opus 5.5

Pass

Run on 2026-10-19Open the raw answer

Test conditions

Single attempt per test, no retries and no edits afterwards. 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

Run it yourself

Paste the prompt into the model or agent you want to test. Save the answer as a .html file and open it in a browser.

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Kart racer in one shot

Games · BridgeMind, 2026

A whole kart racing game from one sentence — the post that made people stop scrolling when a new model launched.

Exhibit No. 007Fail

Escape room in three.js

Games · @gimu_ai, 2026

Seven words, one prompt: build an escape game. The model has to invent the room, the puzzles and the way out.

Exhibit No. 011Pass

Tetris in one file

Games · Community classic

A complete Tetris with rotation, line clears, levels and a next-piece preview.