Nicc, nice to see you are making proper use of this course and that it helped you in your art journey. Keep that attitude in mind.

Now, with the analysis:

Your superimposed lines has some curved lines. When making confident strokes, if you begin to see that you are curving them, try curving to the other side, this tends to fix the line. Also, there is a visible wobbliness in the larger lines, this may be because it was harder for you to ghost the lines that much and you lost confidence. This is completely normal, i personally struggled with this too, remember to ghost AS MUCH AS YOU NEED and take your time to attempt the stroke, smooth, confident and in one shot. Another thing i´ll point here is your tendency to follow the previous line, repeating that mistake. This is something unconscious and normal. Get those other lines out of your brain and focus in making another stroke form zero.

Generally speaking, some constructions present some correction lines, Avoid this at all costs, it´s better that you accept the mistake and keep constructing through it.

About the experimentation... YES, WE MIND. There is a specific reason why these lessons has strict instructions, anything you try to do on your own will only set you apart from the main road and you will not learn anything from it. Stick to the instructions written and in video.

Aside of that i don´t see major mistakes here, just minding the distance between each ellipse, wich shouldn´t be below one another, but it´s not too visible.

It´s a shame that the least quality pictures comes with the rough perspective, because these are the best constructions in your submission, although a quite large margin of error, you managed to get them freehanded correctly. Nicely done!

Rotated boxes is generally good except for the ones in the corners and their neighboring ones, make them slide their vp´s across the axis and make their lines converge towards the guiding boxes. Take note how the boxes in the right and left of the origin box becomes rectangular, this is because you made their edges straight, when they should be more diagonal and converging. Also make sure to use and abuse of the neighboring edges.

Organic perspective gets together your major mistakes, the correction lines are distracting and some boxes present incomplete strokes. Luckily 250 challenge will encourage you to overcome this difficulty

Conceptual mistakes

-Some pictures are out of focus. Try to take better quality pictures next time.

-Rotated boxes has some missing lines. Make sure you draw every form and every line.

-Not using fineliner. Funnells and ellipses in ghosted planes has circles drawn in some other pen, the instructions specify the use of ONLY fineliner black ink.