I knew why Google had used Pacman in the google image, 30 year anniversary. But I didn't realize it was playable, even after using Google a bunch of times since it showed up as the logo. Just figured that out. Use the arrow keys. I guess you can personalize your google homepage and they have had for years a pacman module as a game you can use there, but I didn't know that as I rarely log in, so don't really have a homepage of note.
Now I've been wasting time on Googles homepage, playing the logo, lol.