Your superimposed lines have fraying. Just make sure you're ghosting and drawing from your shoulder.

Ghosted lines are fine. Same with planes just try to push them a bit more, as in do more exaggerated shapes not just squares.

You're ellipses have a tiny bit of overlao but it's nothing serious

Your funnels are symmetrical.

In rough perspective you're supposed to trace your lines not the lines back to the vanishing point in order to see mistakes

In rotating boxes your 2nd boxes are the same size as the middle one and then dramatically shrink, it's supposed to be gradual and the shape is more of a circle where yours is a square, I'd say your boxes taper enough at first and then the second one tapers too much.

The only problem with organic perspective is the perspective itself but the 250 box challenge is for that

Congratulations on completing the first lesson of DaB. I do have a few things to add to Alek's feedback.

You could fit many more boxes in the Rough Perspective and Plotted Perspective frames. Fully completing each exercise is important.

Also, your ellipses look good except you're going over them too many times. Remember, you should be confidently drawing through them only two or three times. Otherwise, you can't tell what the goal of the original ellipse was.

The linework on the Organic Perspective exercise is scratchy. I'm not sure if this is from adding lineweight and it's a little off, the fineliner dying, attempting to correct lines, or a mix of the above. Your linework in the other exercises is good, so just remember to stay confident and commit to inaccurate lines.