Starting with your organic forms, you got a few of them that dont adhere to the simple forms we're aiming for. Rememeber they should be 2 identical balls connected by a tube of consistent width.

You got some pinching and others bulging, so try to work on that. While you have shifted some of the ellipses of the organic forms, you haven't done in all of them, which hints me you might not be understanding the purpose of the contours/ellipses they have.

I recommend giving a look at the page of this exercise again.

Into your insect drawings, they got issues. Although they do look pretty, you're skipping important steps in this lesson and drawabox as a whole.

-Always draw through your forms. Being it legs or abdomen or heads, you need to draw them entirely. after drawing ball-like forms for the head and abdomen for example, you can define a intersection between them to clarify their relationship. but thats after drawing each form entirely. same with the legs. if you draw a leg with 2 sausages, you need to start from where the leg starts on the body, even if its covered on the reference and you cant see it.

Just like with the head and abdomen, if you got a leg with 2 sausages you need to draw each sausage separately, and then draw a contour line to clarify the relationship between them.

-Other important thing is the use of contour lines. Use at least a contour for each form you have, or those forms will remain flat on the page.

-Another important thing is size. You've been doing one bug per page, which is good, but make sure it fills the whole page. For that, you can place dots as guidelines to mark the overall proportions.

-Lastly, is detail. for detail you should never use hatching lines. This is something clarified and explained better on the new texture lessons of lesson 2, so go look at them if you can.

To sum up, all the detail we mark down on the subjects has to be copied from the reference's cast shadows, same approach we took in lesson 2 texture exercises.

The detail should be used as a tool to show how does the surface we're drawing detail is. Not just to show form, as in other courses. Here, contour lines and drawing through the form does that job. So shading with that purpose doesn't add anything to the drawing. Remember the objective of this exercises is to show how those subjects are in 3d space, it is not to draw pretty drawings.