Hi there! Here's my critique of your work.

Lines

Superimposed Lines

Some of your lines were fraying at the start instead of the end, which should not be the case otherwise, hence you may need to take time to properly position your starting point of a line before ghosting it.

Also, I noticed some of your lines having a wobble. Remember, confidence > accuracy.

A wobbly line is incorrect, no matter how accurate it is, and a confident line is much more preferred. With practice, the accuracy will get better while drawing smooth and confident lines.

Ghosted Lines/Planes

I noticed some of your lines arching, make sure you're using your shoulder pivot to draw your lines. Though if it still happens while using the shoulder, you can try to slightly arch consciously to the opposite direction while drawing that said line.

Don't forget you can rotate your page to get a comfortable angle before an executing a line.

Ellipses

Tables of Ellipses

The tables of your ellipses should be kept within the bounds, of the boxes, as some of them are overflowing out of them. At the same time, try not to have them float around without touching the sides or leaving any unnecessary gaps in-between open, shown here. See this as a reference from the notes. A few of them were overlapping with other ellipses, which should not be the case.

Ellipses in Planes

Similarly to the Tables of Ellipses exercise, try to keep your ellipses within your planes without overflowing. At the same time, try to have them hit all four sides of the planes, a few did, but most did not.

Funnels

The minor axis (line in the middle) should be cutting ellipses in 2 symetrical halves, with those ellipses being aligned to said axis, shown here otherwise. See this as a reference from the notes. Again, try to keep your ellipses within the funnel as well without overflowing.

Overall, remember that similarly to lines, you can ghost to develop confidence before drawing them as many times as you need.

Boxes

Plotted Perspective

The back vertical edge should be vertical/perpendicular to the Vanishing Point and not slanted, but I'll let it slide since it's normal for that part to not be exactly perfect.

Rough Perspective

While it may be hard to get it right (understandably, you may need to be bit careful), your boxes' width lines should be parallel to the horizon and height lines perpendicular to horizon, shown otherwise here. You can check if your dots are properly aligned.

Rotated Boxes

Try not to repeat your lines, you risk making your linework messy. No matter how off it is, keep the line as it if were correct and move on.

At the same time, some of your boxes were not fully rotating, as they shared the same Vanishing Point with the previous box. See here. See this as a reference from the notes.

Plotted Perspective

Some of your boxes seemed to be converging in 3 Point Perspective, but others were parallel instead. Here's an image to show what I mean. Don't worry however, you'll get to practice drawing more 3 Point Perspective Boxes in the 250 Box Challenge.