it looks like you understand boxes pretty well

I don't know if your pen is going out or if your not holding it high enough but try to hold it at a higher angle for your ellipses and try to execute a bit faster.

for arrows try to do less ink in the background and thicker as it comes to the viewer also try to think about how the lines would be closer in the background and spread out as they come closer to the viewer, also execute your hatching on them from the shoulder ghosting through them.

ellipses are good but a bit messy probably take a bit more time (i feel like you got this by the time you got to your textures)

textures are really good but i would recommend to out-line them even if they're small

and try to make shadows wrap a bit more on your sausages

good work.