How to make Super Mario Bros in Unity (Part 1) - Level Design
Use Godot's Tileset Editor to quickly paint classic levels like World 1-1. Super Mario Bros NES
You can build a 2D platformer by importing the original sprites and setting the Pixels Per Unit to 16 to maintain the pixelated look. How to make Super Mario Bros in Unity
For a deeper technical dive, resources like Harvard's CS50 Intro to Game Development explain the tilemap and animation logic behind the original game. 3. ROM Hacking & Modding Super Mario Bros NES