Naucto Game Engine

Welcome to the official documentation for Naucto, a browser-based retro game engine powered by Lua.

Naucto lets you create 2D pixel-art games directly in your browser. Draw sprites, paint tilemaps, write Lua scripts, and see your game come to life instantly – no installation required.

Key features

• 320 x 180 pixel canvas with WebGL rendering

• Lua scripting with a simple, focused API

• Built-in sprite editor, map editor, code editor, and sound editor

• Real-time collaborative editing – build games with your team

• One-click sharing and playing

How it works

1. Draw your sprites in the sprite editor

2. Paint your level in the map editor

3. Code your game logic in Lua

4. Play and iterate!

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Getting Started

• Getting Started
  • What is Naucto?
  • Your first game in 3 steps
  • What to explore next

Core Concepts

• Game Loop
  • Lifecycle overview
  • _init()
  • _update()
  • _draw()
  • The golden rule
• Coordinates and Rendering Model
  • Screen size
  • Coordinate system
  • Sprite sheet layout

API Reference

• API Reference
  • Summary

Editors

• Editors
  • Sprite Editor
  • Map Editor
  • Code Editor
  • Sound Editor

Tutorials

• Tutorials
  • Build a Platformer Game

Reference

• Debugging Tips
  • Nothing draws on screen
  • Input does not work
  • Colors look wrong
  • Errors in the output panel
  • Using print for debugging
• Current Limitations
  • No tile lookup from the map
  • No collision queries
  • No sound playback from Lua
  • No delta time
  • What works well today
• Code Structure Guide
  • Basic structure
  • Organized structure
  • Naming conventions
  • Game state management