Vibe Coding with Gemini 3.0: Fabio Sasso Creates Lettrix, a Word Game
Fabio Sasso built Lettrix, a minimalist word game combining Tetris-like mechanics with word puzzles, using 'vibe coding' with Gemini 3.0 and Antigravity. The game was created during the 2025 holiday break for his son, who loves Wordle. Sasso aimed for a single-file HTML build without game engines or frameworks. Initial versions allowed any word, but playtesting revealed it was too difficult; he pivoted to requiring five specific words to advance. The final prototype is hosted on GitHub Pages at https://fabiosasso.com/labs/lettrix/. Sasso describes the process as a proof of concept for AI-driven design, where the designer acts as a curator.
Key facts
- Lettrix is a minimalist word game that merges Tetris and Wordle concepts.
- Built using 'vibe coding' with Gemini 3.0 and Antigravity.
- Created by Fabio Sasso during the 2025 holiday break for his son.
- Game is a single HTML file with all CSS and JavaScript.
- Initial version allowed any word; pivoted to require five specific words to advance.
- Hosted on GitHub Pages at https://fabiosasso.com/labs/lettrix/.
- Sasso emphasizes AI as a tool for rapid iteration and design conversation.
- Article published on Abduzeedo on February 25, 2026.
Entities
Artists
- Fabio Sasso
Institutions
- Abduzeedo
- GitHub Pages