Good work overall, but you had some problems that are especially apparent on the organic perspective exercise, the main issues are line smoothness and the perspective of the boxes. It seems like you didn't always place dots to plan where the lines should go. It's important that you separate the processes of planning lines, finding the right motion and then make the mark. For each line, you should place a dot like you did for the planes excercise, then ghost that line until you're confident in the motion, and finally placing down a mark using that motion.

I recommend you redo the organic perspective. To prepare, read the first parts of the course about markmaking and lines, maybe read about ghosting again if you were having trouble with that, then do the planes excercise for a couple minutes as a warmup and really focus on making smooth confident lines (Don't be afraid of inaccuracy or overshooting).

When you're redoing them, try some more extreme angles with one face of the cube very thin. Make sure there's a slight convergence on the lines, so that lines going in the same direction will eventually meet eachother if you kept extending them.

Don't worry if the convergence is too much or the lines aren't accurate, you can focus on that throughout the 250 box challenge. Just focus on getting smooth lines and that the lines have convergence (Imagine a vanishing point).