azule, BlitzGirl, and Ms. Frizzle did. (Cueball's not used to using a pen, so his ink flow is somewhat erratic. He didn't plan to draw Megan and himself levitating, but in fact he made a surprisingly correct prediction of how their help will look like.)
As the underlying Beanish shows, she's fully grasped the meaning of “yes”. Her usage of “help” indicates that she's understood that one, too, although the underlying gibberish (with a Beanish full stop) adumbrates some remaining confusion. Her full stops are starting to look more Unglish; her tone is still wiggly.