In a food processor, process the pumpkin seeds, coconut flour, hemp seeds, and sunflower seeds until fine and crumbly. Add the dates and process through until they are worked into the mixture and are crumbly. Add the cocoa powder, protein powder (if using), sea salt, and vanilla extract and process again for a minute or two. It will appear as if nothing is happening for a few minutes! The mixture will just be whirring around in crumbs, but soon it will start to become sticky and form a ball on the blade. Stop the machine and remove the dough. Take 1–1½ -tablespoon scoops of the dough and roll in your hand. Repeat until you have rolled all of the dough. Serve, or store in an airtight container to refrigerate.