We have a tutorial based on this repo at Aptos Learn, go check it out!
Difference from Aptogotchi beginner
This is a simplified version that only keeps minting function, it uses On-Chain randomness to determine the look of Aptogotchi at minting instead of manually setting it, and each address can mint as many Aptogotchis as possible instead of 1 per address.
The module is deployed to devnet.