Overall really good work, i wish you had done some studies outside of the demos though,

try adding line weight to you arrows (thin in the background and thicker as it comes closer to the viewer)

maybe a bit more focus on the shadows in textures

very good ellipses and line economy

good flow on the leaves but i think you should try to apply a bit more of the fundamentals of the arrows exercise to them

overall i would say to just really focus on how much ink you use on lines and kinda stray away from making them all the same size really good work though