For people using Origin who are lucky enough to have not switched yet, the EA app attempts - keyword 'attempts' - to merge Spore and Spore: GA ala the Sims and its expansions. If you navigate to GA's dedicated menu, it doesn't have a play button of its own. Aside from rendering Galactic Adventures inaccessible through the app, it also hides how many hours you've spent playing GA. I guess the people who designed the EA app assumed that opening regular Spore opens GA even though it doesn't.
This is a serious dealbreaker with upgrading to the EA app with me and I'm glad my older PC still has Origin installed. I'm not bothering to upgrade until they get this straightened out (preferably by just splitting GA again).
