# Harmony Puzzle The Harmony Puzzle game challenges players to solve 100 levels of gameplay ([see video introduction](https://www.youtube.com/watch?v=zU_LhrDcQyM)). Players' moves are registered as transactions on the Harmony blockchain serving as an immutable record of their score. The puzzle was originally featured during Harmony’s IEO launch on Binance in 2019 where it reached over 81,000 users. Users of the Harmony Puzzle will experience first-hand Harmony’s 2-second finality time and near zero transaction fees. The Harmony Puzzle's [Android app](https://github.com/harmony-one/android-puzzle) is open sourced on our Github. ![](/files/-MOHVImQRloQQvAkd_xd) --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.harmony.one/home/developers/showcases/games/harmony-puzzle.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.