4:12 AM, Tuesday May 26th 2020
You didn't add line weight which is important to help you boxes look solid. https://drawabox.com/lesson/250boxes
Other than that it looks like you understood the point of the exercise. Goodjob! Keep improving your convergences.
Next Steps:
It's important you go back and add lineweight as shown here https://drawabox.com/lesson/250boxes
" One technique that is extremely useful both in reinforcing the illusion of solidity in our forms and in helping to organize our linework and clarify how different forms overlap is the use of line weight. " After you do that I say move on to lesson 2