How does one create a top-notch game level? What are the crucial points here?

How does one create a top-notch game level? What are the crucial points here? Is it about interactivity, readability or something else? Take a look at a recording of a 2013 GDC session by Dan Taylor, a former Square Enix Montreal’s level designer, on the creation of world-class levels that offers a set of tips for beginners. 

In this 2013 GDC session, Square Enix Montreal’s Dan Taylor provides a Ramsian-style breakdown of how to create world-class levels, which distills the art and science of level design down to a concentrated set of fundamental principles for innovation, engagement, and immersion.

GDC 

Make sure to check out the GDC channel for more educations talks.