Note: Don't go saying "Hopscotch isn't social media blah blah blah." This is just a suggestion.
So let's say that you wanna be the first to like MathGirl's new project. You can go to her profile and click on a bell or something and it will say that you turned on her post notifs. Post notifs are notifications you get when a certain user posts something. This will appear in your activity tab. It will say "MathGirl posted a new project." You can either tap the project to play or go to her profile and like.
This is just a suggestion, but I feel like it would be a sweet feature to add.