Jason Guo's profile on Product Hunt

About

Founder of Windflash AI, Web development and operations. iOS/Android APP product development, AI Tools product development.

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Polaytrack Codes

UFO Fans

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Tastemaker

Gone streaking

Gone streaking 5

Maker History

WriteFitAn AI writing coach that trains you, not replaces you
Jul 2026
tarp.toolsFree tarp size, weight & material calculators
Jul 2026
GD Level ToolsFind Geometry Dash levels, demons, codes & fixes fast.
Jul 2026
CoworkHowThe ultimate hub & interactive tools for Claude Cowork
Jun 2026
Tap Road GameAfun and addictive tapping game for everyone
Apr 2026

Forums

p/gd-level-tools

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12d ago

GD Level Tools now picks your first demon in 7 questions

Hi everyone! Jason here, maker of GD Level Tools.

Since launching a month ago, I've kept expanding the site based on what Geometry Dash players actually search for:

Level Finder now covers 89 hand-reviewed levels filter by difficulty, demon tier, skill tag, length, and platform

First Demon Picker answer 7 quick questions, get a personalized first-demon recommendation

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12d ago

Asimov's Foundation Universe - Explore 20,000 years of Asimov's Foundation universe

An independent fan encyclopedia for Isaac Asimov's Foundation saga. Follow the recommended reading order across all 7 books, explore character profiles and key concepts, navigate an interactive 20,000-year timeline and 3D galaxy map, play the Seldon Crisis decision game, and read in-depth analysis — in English and Chinese.

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1mo ago

WriteFit - An AI writing coach that trains you, not replaces you

WriteFit is an AI-native writing coach for people who write less clearly the more they rely on AI. You write first — AI gives specific feedback second, quoting your own text. Each day: a 10-15 min micro-practice, AI diagnosis, your own revision, and version comparison over time. Every sentence and idea accumulates into your personal writing database and style profile.