I think you have to press the green flag.
Remix and add your own mouth. Fun Facts! Why did @15nm23 remix @MoreBetter's project? At first, I was going to make something pixel-ly, you know, Minecraft-style. But my brother, (I'm not telling you who his Scratch username is), looked over my shoulder and looked at the square I drew, and said, "Really?" Me: "Be quiet! I'm working on it!" Him: *laughs* Me: "What am I doing?! I should be in Vector! *switches*" Him: "You should do one of those kissy faces! *laughs*" Me "Fine! I'll just put a three there! *types 3* There! Are you happy now?!" Him: *giggles like nuts!* That really happened! O3O
