# M-Children

- **Event:** [Gemini 3 ハッカソン 東京](https://cerebralvalley.ai/e/gemini-3-tokyo-hackathon)
- **When:** Sat, Feb 21 at 9:00 AM – 10:00 PM (GMT+9)
- **Where:** 東京都渋谷区渋谷 3 丁目 21 - 3 渋谷ストリーム 5F
- **Placement:** 3rd Place
- **Team:** [Haruki Yajima](https://cerebralvalley.ai/u/Haruk1y), [Shuntaro Tokuda](https://cerebralvalley.ai/u/Shun)
- **GitHub:** https://github.com/Haruk1y/Gemini_Hackathon
- **Demo video:** https://youtu.be/C8TGD7_-Fn8?si=wO6JtDc2jDq4hDef
- **Gallery:** https://cerebralvalley.ai/e/gemini-3-tokyo-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/gemini-3-tokyo-hackathon/hackathon/gallery/10

PrompDojo is a real-time multiplayer prompt battle where Gemini runs the entire game loop.
In each round, Gemini creates a mystery target image. Players attempt to reverse-engineer the hidden prompt using text alone, and Gemini evaluates every submission based on visual similarity and scene alignment.

⚙️ What we built:
・Gemini as Game Master👑 — generates diverse target images each round
・Gemini as Creative Engine🧠 — transforms player prompts into challenge attempts
・Gemini as Judge🚩 — scores results and provides match/miss reasoning
・Gemini-powered Reveal💯 — reveals the original “correct” prompt at the end of each round
・Live competitive flow — timed rounds, instant rankings, and real-time multiplayer tension

Welcome to the Prompt Era, where creativity meets strategy, and prompt engineering isn’t just a skill — it’s your competitive edge.

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Markdown version of https://cerebralvalley.ai/e/gemini-3-tokyo-hackathon/hackathon/gallery/10. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt