Before the actual critique, one of the things I found done well was your organic perspective. The boxes you've drawn had interesting shapes and different angles that were pleasant to see. You have a nice grasp for rotating those, and I commend you on that.

However, a general issue I see in most of these exercises is wobbly lines. The reason why this is, is you priortize accuracy while mark-making with (what I assume, otherwise refer to this) your shoulder. Having your conscious brain guide your arm to draw. In order to fix this, trust your arm and focus on making confident strokes. Improvement doesn't come fast, and you'll still see a lot of wobbly lines while practicing. However, as you continue to do this repeatively, it should improve over time. (Uncomfortable explains "wobbling" in superimposed lines, you can see his explaination, here.)

Now, here are some of the last critiques I have.

On your funnels, they are generally aligned to it's central minor axis, which pretty much meets the exercise's goal. However, if you ever revisit these, I'd advise you to draw more. There is a lot of space on that paper, and you can rotate the funnels to fit the space. Here are some of the lesson's examples if you like to see one.

Looking at the edges of your rotated boxes, you can see they all roughly converge to the same vanishing point. When you rotate a box, the vanishing points slide along the horizon line. Watch the video and refer to the lesson instructions if you need more elaboration.

I'm going to request revisions in order to help with your wobbling. Along with that, try at it again with the rotating boxes. It's not going to perfect and it's expected to make many mistakes. The reason why I want you to redo this is to get a general idea of the concept the exercise is introducing you to. Besides this, you produced some solid work, so great job! ^^