In Level 1, we dropped our "Citadel" (the Smart Contract) onto the Ethereum grid. It’s a safe, empty fortress. But a factory without a product is just a building.

Today, we are installing the most important part of our factory: The Storage Vaults. We need a way to define what a Zombie is and a place to keep an infinite army of them.

🧬 Step 1: The DNA Blueprint (Structs)

In a strategy game, every unit has "Stats"—HP, Mana, Attack Power. In our factory, every Zombie has DNA.

Instead of making separate boxes for every stat, Solidity lets us create a Struct. Think of a struct as a Technical Manual or a Blueprint that groups all the characteristics of a unit together.

Solidity

struct Zombie {

string name;

uint dna;

}

👁️ Player Vision: You walk into the center of the citadel and install a holographic terminal.…