Tree Appreciator was created from a single prompt, according to Simon Willison
Simon Willison says the game Tree Appreciator was created using Claude Opus 5.5 from a single prompt without further instructions. He links to both a playable browser version and a conversation transcript.
In a more recent article, Simon Willison clarifies that the game Tree Appreciator was created from a single prompt without further instructions or repeated revisions. He used the standard Claude chat interface and links to both a playable browser version and a conversation transcript.
The prompt called for the use of the three.js library and two algorithmically generated trees, with the player looking for differences between them. According to the author, the resulting game is adapted for mobile devices, and completed trees are saved in an in-game herbarium. The original description also mentions music, animations and achievements.
In the original post, Willison reported using the Claude app for iPhone in chat mode and a processing time of 3 hours and 7 minutes. He identified the model there as Claude Opus 5.5 Max, while the more recent article uses the name Claude Opus 5.5.
Why it matters
The published prompt and conversation provide a concrete template for an experiment in creating a small browser game: they specify the library, the scene generation method and the basic gameplay mechanic. The assessment of how entertaining the result is comes from the author himself.
What was added since the original report
Verified updates
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According to the author, the game was created from a single prompt without further instructions or revisions.; The author links to a playable browser game and a conversation transcript.
- According to the author, the game was created from a single prompt without further instructions or revisions.
- The author links to a playable browser game and a conversation transcript.
Relevant practical impact
What this means
For individuals
Anyone interested in building their own game prototype can follow the approach described using the standard Claude chat interface, which Willison also used on his phone.
Check the original
Event sources
only one source so far · 1 publisher, 1 independent. We count feeds from the same owner only once.