The thing I immediately notice is that you have completed your exercises digitally. This isn't necessarily a bad choice, some students do this to improve their skill with a tablet and stylus. But Drawabox is first and foremost a traditional art course. It is strongly recommended that you use physical materials to complete your homework. You'll find an explanation for this on the page for Lesson 0 and on Uncomfortable's blog, linked here: https://drawabox.com/article/ink.

Not only is it impossible to verify whether you have used the undo function to hide imperfections in your linework, but on many of the perspective exercises you appear to have used a line tool to render your boxes! This makes giving critique more difficult, since I don't know how much of the homework is down to your ability, and how much is down to the computer.

But I digress.

Superimposed Lines

Your work is very wobbly to begin with, but this seems to improve over time. Make sure to maintain a consistent speed and don't fret about the end result! I can just about tell where you have started each stroke, but there is a large amount of fraying on both ends of your superimposed lines. This indicates you weren't thinking straight and might have been rushing. The start of your line should be in the exact same place each time. A good mixture of attempts at straight lines and curves.

Ghosted Lines

Very good. You're overshooting by quite a lot, but it appears like you've maintained a level of confidence and flow from the previous exercise that this shouldn't be too hard to correct. The important thing is that you take time to line up your shot as it were.

Ghosted Planes with Ellipses

You have included a failed attempt in your Imgur gallery that really should have been removed. The attempt that does feature ellipses is OK, you have a good level of accuracy and flow, but the interior lines have been drawn with a ruler and you didn't follow through with your ellipses. You shouldn't be drawing perfect ellipses in a single pass right now. That comes later in your own time.

Table of Ellipses

There are a lot of ellipses here, so well done on making such a big effort, but at some point you stopped drawing through your ellipses and tried to perform them all in one pass. When you do get around to drawing your ellipses properly, they feel very loose and wobby. When you try to do it in one swift motion, the line doesn't connect smoothly.

Funnels

Again, you're not drawing through your ellipses and now have the additional issue of identical minor axes. The innermost ellipse should have the smallest minor axis (i.e. it's thinner than the others), which gradually expands as you draw further away from the centerline. Otherwise your accuracy is pretty on point.

Plotted Perspective

You understood this perfectly, but next time maybe put a bit less effort into presentation? Deciding unique colours for each box might be fun, but it doesn't make it any easier to mark. These exercises aren't supposed to be pretty to look at, they're supposed to teach you a lesson. Ideally, no-one else is going to see them and if you're really finding yourself drifting off during study time, either draw something more interesting or take a nap. Also, it's expected at some point during this exercise that you move the position of the vanishing points around so you get to play with distortion and fun things like that. Would have also liked to see a greater variety in box dimensions as well.

Rough Perspective

Not only did you use the line tool for extending your lines to the vanishing point so that you could display convergences, but you also used them to render the boxes, which defeats the point of the exercise!

Natural Perspective

The dimensions of your boxes aren't consistent, which makes it very difficult to determine the scale and distance of each box. They should all resemble a unit length cube, only with a different overall size and convergence depending on how close they are to the viewer. Also, they barely overlap half the time! It seems like you got better with this as you go on, but there's little indication that these boxes are in fact receeding into the distance.

Rotated Boxes

Pretty excellent! Pat yourself on the back for doing it at all.

Some students just run away in fear...

There's some good rotation in there, but some boxes aren't rotated enough and the spacing between them seems a little wide. They need to be very tightly packed. Also, make sure to use shading to clarify where the outer faces are!