About 21, I've dug through the game's files and found unused graphics that reveal a TON of information. First off, there is a graphic meant for the 21 graphic after already having watched the animation. This sprite depicts the earth having been split in 2, confirming that 21 would've been about the world ending. Secondly, some unused text to go along with the athormentioned
graphic when you would hover over it. And the creator of 21 is (drumroll please)... MartianBattlePlan! That's right, 21 would've been his 2nd flash after 12. Last but not least are remenants of the 21 flash, though very little of it. Seriously, only 1 line of 1 frame of animation.
Anyways, good game, enough said.