Introducing Gemini-Guess: A Multi-Turn AI Reasoning Game
I’m excited to share the MVP of my hackathon project, Gemini-Guess!
You can try it live here:
https://gemini-guess.qz-l.com/
it is my first time to join a public hackathon,
Gemini 3 Hackathonhttps://devpost.com/software/gemini-guess
What is Gemini-Guess?
Gemini-Guess is an open-ended game where players challenge Gemini 3 to guess any idea, object, or concept. Players can provide clues via text, voice, or video, and Gemini 3 responds with deep, multi-turn reasoning, showing its thought process at every step.
Inspiration
Inspired by the timeless fun of guessing games, I wanted to see how far AI can go in reasoning about open-ended ideas. Gemini 3’s ability to follow complex, multi-step reasoning made it the perfect AI for this challenge.
What it does
- Players think of a concept, object, or idea — or say/show it.
- Gemini 3 attempts to guess it using multi-turn reasoning.
- The game tracks rounds, AI guesses, and allows replaying the AI’s thought process.
- Supports text, voice, and video input for natural interaction.
How we built it
- Next.js for the frontend web app — fast and hackathon-friendly.
- Gemini 3 API powers the reasoning and multi-turn guessing.
- Web APIs handle microphone and camera input for voice/video clues.
- Game state stored in memory for simplicity; ready for leaderboard tracking.
- Replays rendered visually and with audio playback for judges and players.
Challenges we ran into
- Designing prompts that work for unlimited concepts.
- Handling voice and video input smoothly without latency.
- Keeping the game fun while allowing AI to sometimes fail in interesting ways.
- Managing multi-turn reasoning so it can be replayed concisely.
Accomplishments
- Showcased Gemini 3’s depth and nuance in reasoning.
- Created a replayable game visualizing the AI’s thought process.
- Enabled text, voice, and video inputs in a single interactive app.
- Made it accessible — fun for anyone, not just kids.
What we learned
- Gemini 3 handles deep, multi-turn reasoning across open-ended challenges.
- Multimodal input (voice/video) makes AI interaction feel natural.
- Prompt design is both an art and a science.
- Watching AI think is almost as fun as playing the game!
Next steps for Gemini-Guess
- Add leaderboards and global scoring.
- Expand voice/video AI interaction, possibly with live-stream challenges.
- Optimize prompts for faster AI guesses without losing nuance.
- Create a mobile-friendly version using React Native for on-the-go play.
Try it yourself!
Experience Gemini 3’s reasoning firsthand:
https://gemini-guess.qz-l.com/
I can’t wait to see what concepts you challenge Gemini with — it’s surprising, fun, and sometimes hilarious!
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