ONE LINE PUZZLE

AI-assisted one-line puzzle game built with Unity, Codex, and GPT-5.6.

Comment

Inspiration

Modern puzzle games are often filled with unnecessary complexity, making it difficult for players to enjoy quick and relaxing gameplay. We wanted to create a clean, intuitive puzzle experience where a single touch can lead to satisfying solutions. Inspired by classic one-line drawing puzzles, we built ONE LINE PUZZLE while exploring how AI could accelerate game development, iteration, and polishing.

What it does

ONE LINE PUZZLE is a mobile puzzle game where players must connect every point using a single continuous line without retracing their path. The game features handcrafted levels, a hint system, undo functionality, smooth animations, visual effects, progression, and daily challenges. It is designed to be simple to learn while becoming increasingly challenging as players advance.

How we built it

The game was developed in Unity using C#.

Throughout development we used Codex and GPT-5.6 to accelerate programming, gameplay implementation, debugging, UI improvements, feature prototyping, optimization, and documentation.

Core systems include:

One-line drawing mechanics Level validation system Hint system Undo system Daily Challenge JSON level loading and saving Level Editor Procedural level generation Google Play Games integration Reward Ads and No Ads support

While AI significantly accelerated development, all gameplay decisions, balancing, testing, and final implementation were completed by the developer.

Challenges we ran into

Designing an intuitive one-line drawing system while ensuring every puzzle remained valid and enjoyable was one of the biggest challenges.

Other technical challenges included:

Preventing invalid paths Creating a reliable puzzle validation algorithm Optimizing the LineRenderer for smooth drawing Designing scalable level data Balancing puzzle difficulty Improving performance on mobile devices

Codex helped speed up experimentation with different implementations and greatly reduced debugging time.

Accomplishments that we're proud of

We are proud of creating a polished mobile puzzle experience that combines elegant gameplay with modern AI-assisted development.

Highlights include:

Responsive one-line drawing controls Smooth gameplay experience Built-in Level Editor Intelligent hint system Daily Challenge mode AI-assisted development workflow using Codex and GPT-5.6 Playable Android prototype with scalable architecture What we learned

This project showed how AI can dramatically accelerate game development without replacing creativity.

Using Codex and GPT-5.6 allowed us to:

Prototype ideas faster Solve programming problems efficiently Improve code quality Iterate gameplay mechanics more rapidly Focus more time on game design and player experience

We learned that AI is a powerful development partner, especially during rapid prototyping and feature iteration.

What's next for ONE LINE PUZZLE

Our roadmap includes:

Hundreds of new handcrafted levels Endless Mode Community-created levels Additional puzzle mechanics New visual themes Cloud save synchronization Global leaderboards Achievement system Seasonal events Release on both Android and iOS

We plan to continue improving the game while exploring even deeper AI-assisted workflows throughout future development.

Built With

Share this project:

Updates