Ah, solving that might require the use of Wikipedia, if you're not already familiar with it. (But, it's nothing too complicated.)
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I figured out the answer literally RIGHT after you sent this message. I seriously don't know why I didn't try "Chinese Zodiac" before this! I am so smart for figuring everything else out and so oblivious that I didn't even think of what the theme for the level even was at the same time! I am so sorry for asking such a dumb question to the creator of the entire game.