---
format: "aidr-story-markdown/v1"
id: "eb4b2d9063ab8e79fdabef3287feedabfee879e65c93347d4b7b683904309fb0"
canonical_url: "https://aidr.today/eb4b2d90?lang=en"
title: "Tree Appreciator"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-10-14T21:23:01.000Z"
category: "Products"
topics: ["anthropic","llm"]
source_urls: ["https://simonwillison.net/2026/Oct/14/tree-appreciator/"]
summary: "A developer used the default Claude iPhone app to prompt Claude Opus 5.5 Max to build a Three.js game called Tree Appreciator, which generates two algorithmically created trees for players to compare in a spot-the-difference format. After 3 hours and 7 minutes of processing, Claude returned a game featuring music, animation, and achievements."
---

# Tree Appreciator

> [Open the canonical story](<https://aidr.today/eb4b2d90?lang=en>)

**Published:** 2026-10-14T21:23:01.000Z
**Category:** Products
**Topics:** anthropic, llm

## Summary

A developer used the default Claude iPhone app to prompt Claude Opus 5\.5 Max to build a Three\.js game called Tree Appreciator, which generates two algorithmically created trees for players to compare in a spot\-the\-difference format\. After 3 hours and 7 minutes of processing, Claude returned a game featuring music, animation, and achievements\.

## Sources

- [Story source](<https://simonwillison.net/2026/Oct/14/tree-appreciator/>)