Hi! From a quick glance, this appears to be a really solid submission. You’ll forgive me if I don’t have too much to say of it, in the way of critique. Let’s see~

Your superimposed lines look great! They’re smooth, properly lined up at the start, and of a consistent trajectory. The same can be said of your ghosted lines/planes. I have 2 suggestions in regards to them, however. The first, is to make their start/end points a little smaller. (The idea is that a perfect line should swallow them both.) The second is to be a little more mindful in regards to when you lift your pen off the page. Don’t get me wrong, a little taper at the end is great - it makes your line look really dynamic - but too much of it isn’t ideal. Of course, as per the 3 levels outlined in the ghosted lines section, this is something that you’re not expected to nail immediately, so don’t worry.

The table of ellipses exercise looks great. Your ellipses are smooth, rounded, of a consistent degree/angle in a frame, of many different degrees/angles, and do a good job of touching all 4 sides of the frame. Basically, they do everything right. The ellipses in planes exercise looks equally good, and I’m especially pleased to see that they’re still quite rounded, despite the increase in difficulty. Their second rotation has a little more difficulty matching their first, in this exercise, but this is expected. To mend it, see if you can spend a little longer on the ghosting stage, next time. Finally, the funnels exercise looks great. The minor axis does a good job of cutting each ellipse into two equal, symmetrical halves, and them increasing in degree as they move further from the center is a nice touch. I will recommend, however, using a ruler for the minor axis line, and making sure it’s extended all the way (or, conversely, that the ellipses stop when it does.)

The rough perspective exercise looks good. The 2 sets of lines that should be parallel/perpendicular to the horizon are, and the 1 set that should converge does, quite comfortably, too. The rotated boxes exercise looks great. It’s big, the boxes are snug, and, though not always successfully, they make a solid attempt to rotate. Finally, the rotated boxes exercise looks fantastic. It flows quite nicely, as a result of the shallow, consistent foreshortening, the many boxes, and their many overlaps, and the boxes themselves are quite good, too. Whatever minor issues there are, will be certainly taken care of in the 250 box challenge, so feel free to move on to it.