Great submission! Overall I think your lines are looking quite nice.

Lines: Looking good. Sometimes they go way too far (like on the corners of your planes), so work on your control - practice being able to not just make a good line, but stop it where you want it to stop.

Ellipses: It looks like you've drawn through every ellipse 3 full times. While this is technically allowed for the exercises, I think based on your ellipses (which are mostly looking well formed) you could stick to just 2 times and wind up with cleaner ellipses. In some of your ellipses in planes, it looks like you've deformed some of them to reach the edges of the planes, resulting in squashed or lumpy ellipses. While your goal should be to touch the edges, your focus should be on forming the ellipses well even if they don't touch the edges.

Boxes: Great job on organic perspective, which can be a tough one. You have some issues with the perspective on the boxes but you'll work on it in the 250 box challenge. Great effort on rotated boxes. You seem to have rotated the boxes and the hatching you used has a good visual effect. It looks as though you went over some of the lines many times, which you should watch out for - if you're going to do heavy outlining like that, make sure you are still drawing from the shoulder and ghosting the lines - don't be tempted to use your wrist drawing skills to add precise details on exercises like this.