First,There is a little wobbles in longer lines. But don't worry, you will get better as you continue to draw. There is no frayin on both end in ghosted lines exercise. That's good. In ghosted plane your lines getting better. The ellipses are touching each other in table of ellipses exercise. They are good.There are no floating in ellipses in plane exercise.They are touching the boundaries.The boxes are also good.The corner are close in rotated box exercise which is good.in organic perspective exercise, I can see that your boxes are clearly rotating. Your understanding of boxes and perspective will improve as you do the 250 boxes challenge.Great work. Cheers mate. Have a great day!!!!