Game Design Library is a hand-curated, catalogued collection of game design links. Learn more
https://www.deengames.com/blog/2018/how-to-get-your-game-to-done.html
project management prototyping
Many games don't make it to completion. An analysis of some common reasons games fail, and some ways to give your games a better chance at finishing. Analyze risks, prototype to find the fun, cut scope, and test thoroughly.
https://medium.com/super-jump/how-to-start-designing-games-f4cb5440ebf9
theory mechanics prototyping aesthetics core loop goals
A thorough introduction to the fundamentals of game design, and how to implement them in your game. Aesthetics, mechanics, economy, narrative story, mechanics, goals, prototypes, and how to connect them all together.