Hello,

here's critique:

  • Arrows: OK, though lines where you went over to indicate line weight are kinda sketchy, in future just ghost a bit before applying them

  • Contour forms: then ones with ellipses look OK, for the ones with curves it looks like they do not change in degree much

  • Textures: OK

  • Intersections: your boxes hidden corner is misplaces in a lot of boxes, cylinders are kinda bad too (the side farther away should always has a wider degree ellipse, also they are kinda flattened). Though this one is tough.

  • Organic intersections: OK, some shadows are wrong though, shadow should fallow the form they fall on - so they should change direction and become more flat when they hit the floor

I suggest spending some time to practice area I mentioned before moving on to the next lesson.

Good luck in your art journey!