12:15 AM, Wednesday September 9th 2020
Im glad you found the critique helpful :)
The little blurb you mentioned at the bottom of the page was me suggesting that youve finished this lesson. When other people come to check on this, they have the option to agree with me by clicking a little button. Once two people agree, youll get the credit for finishing this lesson. Dont get discouraged if this takes a while because it might, and in the meantime Id suggest just moving on. Youve done the excersize so having it "officially" recognized just serves as some validation. As for when you've "finished" a lesson, I believe its done as soon as you submit it. The excersizes are designed to be completed and forgotten about. The only exception is the excersizes here in lesson 1 and also lesson 2, which can be done again as a warm up like I suggested you do with the ghosted planes. You dont have to go crazy trying to "finish" these warmups or anything as you wont be submitting them anway, its just a way to get a little extra practice in where you may need it.
Hope that answered your questions