Where is it? Find the tutorial on the Repl.it Docs
What is it? Take a detailed look at how the classic 90's snake game can be built in python using PyGame. The tutorial walks you through creating, moving and feeding the snake and by the end of it you will have a basic implementation of the snake game that you can add other features to.
What you need to follow? Intermediate python experience is ideal but you should be able to follow along even if you're a beginner. You'll do everything from your browser so no Python set up is required. You can create a free account on Repl.it to save and share your code.