Awesome! It's finally been made! Thank you Mr. Penaz!!! I'll get to reading it ASAP!
However, Ruby-cat is not impressed:
Viewing post in Version 0.7.2 has been released! comments
Hopefully it's up to your expectations. Sadly many pieces are still placeholders and my knowledge in game development and programming languages is limited so if you find any mistakes, unclear passages or anything feel free to post about them in the forum board here: https://therealpenaz91.itch.io/2dgd-f0th/community
The book is completely open source, so if someone wants to give a hand making a ruby version, it's more than welcome!