Lines are p confident and neat in general, good job! Ellipses do get a bit wobbly, so don't forget that in ellipses as well as lines you should try to do them as confident as you can, don't hesitate in sacrificing accuracy to get them smoother and more confident.

Lines look p good in general too but they do have issues:

On rotated boxes, some of your boxes weren't actually rotating, careful with that, this mistake is explained here.

You are repeating lines that were off, no matter how off a line is, don't repeat it, keep going as if it was correct.

Don't forget to draw through your boxes on organic perspective. You should be able to see the boxes, even if they're covered by other boxes. You can add lineweight to clarify their relationship on the line overlaps after.

I recommend trying more overlaps on organic perspective as well. You can clarify after the overlaps by adding a confident, drawn with the shoulder superimposed line on the part of the silhouette of the boxes that overlap. Perspective on them has issues but you'll work on it on the box challenge, so don't worry about it!