Good job finishing it!

I'm seeing a couple of things here:

When you do the superimposed lines, or the ghosted lines (so basically really just when you do any line), even though you may be moving relatively fast when you ghost and when you draw the line itself, you should not be rushing the markmaking. Do your ghosting until you feel like you're confidently doing the right motion, then stop and properly set down your pen at the start point and only after you've definitely done that, execute the actual line.

You want your marks to be well planned well prepared and carefully executed like this.

The result should be your superimposed lines fraying only at one end, and your ghosted lines always having one end perfectly on the dot.

This of course also applies to any lines you draw in boxes, or for any other purpose.

Next, the ellipses. You're doing well enough with the ellipses, the confidence and accuracy is something you'll be building over a long period of time, but as per the instructions in drawabox, while you should always draw through your ellipses at least once, you also should never draw through more than three times. The lesson says 2-3, and I personally think you want to try to do just 2.

Finally, you are often attempting to fix lines by drawing them again. This is something you really want to avoid, as instead of fixing a mistake, it draws attention to it. It also results in messy drawings with inconsistent line weights. If you look at a box you drew without doing this from afar, then you'll probably find that they actually do look good even if you didn't hit the target point with your ghosted line! But if you tried to correct by drawing another line, it sticks out like a sore thumb.

So you should keep these things in mind when you do these exercises in your warmups from now on, and generally in your markmaking for the rest of your future exercises.