I don't have IG myself, but the layout is so elegant and beautiful! I think Hopscotch's layout is a little bulky, and it's kind of hard not to tap the "upload" button when liking a super awesome project.
So, I think it should look a little more like Instagram, (not because I favor it I don't even have it lol) because it's really beautiful and simple, and liking things is way easier. (Just a double tap.)
This is just a suggestion!