The code looks bad. I guess it has been refactored later. The repo says this code is only for educational purposes. This spaghetti can be still a good example

The code looks bad. I guess it has been refactored later. The repo says this code is only for educational purposes. This spaghetti can be still a good example for the reasons you mentioned. Or maybe it is a good example for an ugly prototype version of an game. This could be even better if people could see a refactored version of this codebase.