Nice work overall! Your lines section is solid. Confident execution, and a solid use of the ghosting method to maintain control over your accuracy. When you get into your ellipses, you do start to get a little stiff - this can occur by simply drawing too slowly, by not applying the ghosting method (and therefore not executing your marks with a confident, hesitation-free stroke) or by drawing from your wrist instead of your shoulder.

Skipping on down to your boxes, your work here looks solid except one issue with your rotated boxes. You're not quite covering the full range of rotation along the major axes, as explained here.

Other than that, great work.