I have some theories about Bad Apple (mentioning them to anyone else nets me this: "Like Inception?")
Keep in mind, this interpretation requires one to shelve the fanon theory of "Maribel is Yukari" that some people believe, so if you're one of those people, ignore me.
I think it's Maribel singing this one, lost between two worlds, hers and theirs. She no longer can tell the difference between reality and Gensokyo. (Maybe it's a dream, maybe nothing else is real)
She has been cycling between them pretty regularly (ever on and on, i continue circling, in a Carousel of agony)
She no longer has feelings for anyone (my heart starts vanishing)
She asks herself which side she will stay on (black, white, black)
She knows it's important, and at the end, as far as I can tell, she picks black. Question is, which side is "black?" It's never made clear.
Possible Interpretations of Black vs. White
Gensokyo: Adventure, Adrenaline, Fun times (white) versus Reality: Boring, bland (Black)
OR
Reality: Safer, not as likely to be attacked on sight (white) vs. Gensokyo: Inherently risky, very likely to be attacked by a youkai, (black)
1st view: Guess she's not into adventure. Which makes NO SENSE, given that she's very clearly portrayed as such.
2nd view. She likes risks, and decides they're worth it.
And now my pathetic attempt at an ASCII comic.
Reimu coins pit YukariCam
____(<$-$>)ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo_ooo _______________________<>
| |
|⑨|
| |
|_⑨_| <----Actually set by Yukari. She's bored again and decided to use an amateurish prank so as to make Reimu and Team ⑨ clash again.
Reimu: MONEY!!!!!!!
Yukari: This'll be fun... and harmless. And it beats watching people throw a ball around, since that's all people love on Mondays. How that's football is anyone's guess.