Hello yung_pistachio congrats on completing L1. Here are my thoughts and comments regarding what can be improved in your submission:

Superimposed Lines: It is very common that in lines that expand most of the page arching will be visible. Just remember that you can consciously arch in the opposite direction if you want to counter this effect.

Ghosted Lines: Some wobble/curviness can be perceived in some lines. As you keep practicing drawing with your shoulder, this will be decreased but do keep it in mind.

Funnels: Minor axis is misaligned in some attempts

Rough Perspective: Usually as the focus of the exercise shifts, student's line quality will drop significantly, especially on this exercise. This is not the case with yours and I want to highlight that fact. Your line confidence stayed mostly intact, good work.

Rotated boxes: Most boxes aren't actually rotating and are still following the same vanishing point. I'd also suggest that you employ the use of hatching lines to help create a visual hierarchy.

Organic Perspective: Good work, just make sure that the rate of foreshortening is kept consistent. For example, in the first attempt the closest 3 boxes are significantly bigger than the rest. Try to keep the rate at which the boxes grow more consistent.

Conclusion: Good work, you are definitely on the right path and I'm marking the lesson as complete. Remember to incorporate these exercises as warm ups during the next lessons and I'd encourage you to try your hand at the rotated boxes exercise considering the points remarked above. If you haven't already I suggest that you join the Drawabox discord server for further assistance.

Best of luck in the 250 box challenge.

-Slyx