11:58 PM, Monday November 22nd 2021
Hi, first of all I congratulate you upon completing this challenge as it requires patience and time. However there are some things that you have to take in consideration.
All of your boxes have dramatic foreshortening, which suggests an object with very large dimensions, but as we go through this course you'll notice that most things we'll draw are not immensely large, and our constructions will make use of forms with very shallow foreshortening.
Try to vary your rates of foreshortening more. Right now they're pretty much all being drawn with a very dramatic rate of foreshortening, but you're not experimenting with more shallow foreshortening at all. It's important to practice both.
Remember that the reason why we extend our lines is to be able to identify or mistakes and try to improve them, I can't really imagine that the way you drew most of your boxes really gave you much useful information in that regard, and so there wasn't much room for growth page over page.
Next Steps:
Please consider drawing 50-75 more boxes with shallow foreshortening or far away vanishing points, as it is very important to get later on.