Simple mechanics fall into line to make complex gameplay when they are used in tandem with each other to make combinations. These combination create variation that adds challenge to playing the game and make the mechanics fresh by changing them up. Like already said about rocket league, it combines driving, boost, turning, a ball and goals, and other simple mechanics to create an incredibly complex and deep game. The combination of them is the key to the technical aspects of what makes Rocket League unique. It is useful to know what these mechanics are when reviewing a game because it helps understand how the game works, and can also give an idea of why it works that way or what the developers were going for. Having reference also lets you know if the mechanic was executed well, and to what degree it was used. Like how a double jump, dash, and wall climb combine together to be used for challenging platforming sections. These ideas help explain what works by understanding what the goal for the mechanics is, and how well they meet that goal. Understanding the goal is what can quantify how well made a game is, because the goal that the developers set to score is the most important part of the game.