Hi

For the first activity (Superimposed lines): You sometimes have fraying at the start, most notably here https://imgur.com/a/FlEDNyw, try to watch out for the fraying at the start and be conscious that when you're lining that up. Next is that your lines, especially longer ones, curve. Sometimes this can either be because you are tethering from your elbow, otherwise it can just be done subconsciously. If so, try to counteract this by drawing a curve Consciously the opposite end.

next for the ghosted planes: remember to finish some off, your second page top left and top right are partially unfinished.

For the ellipses table: only a very small portion of your ellipses go over the page and overlap. Also, on page 2, bottom right box, bottom right circle and a few others spike sometimes. remember to draw the ellipses confidently. Confidence over accuracy!

For the rough perspective: some of your height lines ( Vertical ones) slant. For instance, on your first page, second box, far bottom right cube is slanted slightly. the Y lines should always be perpendicular to the Horizon Line. I also see that you tried to draw another line over the first; In box 2, top far left boxes' line has been drawn over twice. Try not to draw over a line no matter how far off it is. Dont be too afraid of mistakes like this. Sometimes, your width lines (horizontal lines) slant slightly. Width lines should be parallel to Horizon Line.

For the organic perspective: I only have 1 comment, although this isn't on the critique sheet, i wanted to add this on. https://imgur.com/a/7geMgSX. some of your lines foreshorten too quickly, which may give the impression that the box is closer than it seems, especially since the bigger one in front isn't foreshortened as much as this one, i made this mistake myself. The red line should be less foreshortened than the original blue. Sorry for my terrible examples, i hope you can understand my point! And i hope all my links that i put work! sorry if they dont.

That's all i see, sorry if i missed anything!

Also: you either forgot to upload the funnels excersize or missed it!