Casey is really well known in the gaming community - https://mollyrocket.com/casey/about.html Through Handmade Con, he's also interviewed many other creators like Jonathan Blow and Edmund Mcmillen. He also contributed to Blow's recent game, The Witness (specifically the movement system and the world editor).

This is a really good series by an experienced game developer that's basically free (or at least the Zed Shaw model of pay to download but free to view).