Hi Jwala! I'm also new here but I thought I'd comment on your rotated boxes because it looks like you struggled with that exercise. I think you did quite well on the boxes along the vertical and horizontal lines, but your outermost boxes on the diagonals (e.g. top left) look odd. If you look at the example on the homework page, you see that as the boxes move away from you the two axes furthest away on the box (from your "eye") are shorter than the closest axes and the angle between them becomes larger. They kind of look flatter than the two axes closest to you. You've drawn those two farthest axes so the outermost edge of a box has a diamond shape, and both the closest axes and the furthest axes have the same angle. I think if you corrected those axes that are further away, your rotated boxes would come out looking good (and the whole thing would look more like a circle than a square)! You can see more examples of some boxes showing that effect here.

I hope that explanation is helpful. Otherwise I think it looks really good that your superimposed lines clearly get better with each attempt. You could also try that exercise with curves.