Feng Shui Banana: My Reflexive Journey at Gemini 3 Hackathon

10 January 2026 will always stand out as one of those “just go with the flow” days. It all started when Mr. Chan casually asked around 19 Dec 2025, “Want to join the Gemini 3 Hackathon at Google Singapore?” I said yes without thinking too much.  Initially, I even asked if we could do something related to finance and audit—but he wasn’t keen. So, I proposed GeoHarmony, an idea to analyze Singapore business locations using Feng Shui principles. It felt aligned with my research interest in machine learning and Chinese metaphysics. I quickly built a prototype in Google AI Studio, shared the link, and Mr. Chan submitted it. Later, he asked me to recruit two more members—Benny and WK joined.

When Google DeepMind x 65 Labs approved our submission out of 800 entries, reality hit: we were going to Google Singapore! We decided to carpool with Mr. Chan and make it a team adventure.

We left Johor early, crossed Tuas checkpoint, and by 8:30 AM, we were at Google Singapore. The exterior was stunning—modern, sleek, and everything I imagined. Walking into the open workspace felt surreal. Google has always been on my bucket list, and here I was, standing inside.

Breakfast at the Google Café was another highlight. Initially, we thought of grabbing McDonald’s, but why spend money when Google offers free food? It was a true “Google moment.”

Team Dynamics & Emotions

The night before, I was so nervous I couldn’t sleep. This hackathon felt different from the ones I’d joined before. Meanwhile, Mr. Chan was completely zen, and the others were relaxed—they were here for the experience. None of them had hackathon exposure, but that didn’t stop us from diving in.

Challenges & Pivot

Things got interesting when the organizers announced the six hackathon tracks. I had doubts—did our idea even fit? After brainstorming, we decided to pivot. Instead of GeoHarmony, we built Fengshui Banana, focusing on Track 6: Real-Time Multimodal Experiences using Gemini Live API.

We integrated an open-source Bazi project from GitHub to calculate suitable colors and career positions based on birth data. This gave our app a unique twist—real-time Feng Shui insights powered by AI.

You can check out our project here:
Live Demo: feng-shui-banana.vercel.app
Source Code: github.com/WeiKhjan/feng-shui-banana

Tools We Used

Highlights & Learnings

When I saw our project approved by Google DeepMind, I thought, “Cool—maybe Google is starting to take an interest in Chinese metaphysics!”

Technically, I learned a lot:

• Vibe coding with Claude Code for fast iterations
• Prompt engineering for Nano Banana
• Importance of listing all Google tech used in the README

Networking was minimal—I was too tired after seven hours of coding—but I did meet Sean, a startup engineer, and a reporter from Business Insider.

Personal growth? Definitely. I realized hackathons push you to use every tool available and think creatively under pressure.

Reflection & Future Plans

One surprise: hackathons in Singapore have no age limit! In Malaysia, most do. Seven hours of vibe coding was exhausting—fun once in a while, but not something I’d do regularly at my senior level.

Will we continue developing Fengshui Banana? Maybe. If the team has ideas to monetize it, I’m in. For now, I’m grateful for the experience, the learning, and the chance to step inside Google Singapore.

Final Thought: Sometimes, the best experiences come from saying “yes” without overthinking. This hackathon reminded me that innovation often starts with curiosity—and a little bit of spontaneity.

1. What is the Gemini 3 Hackathon?
The Gemini 3 Hackathon is an event organized by Google to showcase and build innovative applications using Gemini AI technologies, including multimodal APIs and advanced agentic coding.

2. Where was the hackathon held?
It took place at Google Developer Space, Level 3, Google Singapore.

3. What is Fengshui Banana?
Fengshui Banana is an AI-powered app that combines Chinese metaphysics (Bazi) with real-time feedback using Gemini Live API to suggest suitable colors and career positions.

4. Why did you pivot from GeoHarmony to Fengshui Banana?
The pivot was due to the hackathon’s open-source requirement and the opportunity to align with Track 6: Real-Time Multimodal Experiences.

5. Which hackathon track did your project fit into?
Track 6: Real-Time Multimodal Experiences, focusing on voice and vision agents with Gemini Live API.

6. What tools did you use for the project?
Gemini Live API, Claude Code, Nano Banana, Google AI Studio, and GitHub for open-source hosting.

7. How many submissions were there, and was your project approved?
There were around 800 submissions, and our project was approved by Google DeepMind.

8. Is Fengshui Banana open-source?
Yes, the project is open-source and available on GitHub: github.com/WeiKhjan/feng-shui-banana.

9. Can Fengshui Banana be monetized?
We are exploring monetization ideas, such as premium features or business consulting integrations.

10. Are hackathons suitable for all ages?
Yes! Unlike some Malaysian hackathons with age limits, this event had no age restriction, making it inclusive for all levels.