10:54 PM, Thursday June 18th 2020
Hello! I'm no expert but I wanted to add something I think would help you. I'd suggest varying the shape and angle of the boxes that you draw to challenge yourself further. I'd especially suggest rotating the boxes to a more extreme angle and drawing them like that. Most of the boxes you drew look pretty similar (looking down on a cube-like box). Hope that helps. Congrats on finishing the challenge :)