Hmm. I like the use of that fairly unexplored part in Origin of Mewtwo. Creative, especially with the somewhat religious tone in there. That seemed to be all about genetics, but you made it even bigger than that. Nice. Good job in establishing Amber's point of view, and her clear emotions about her father creating her "replacement". It's also interesting how you sped up the timeline, so that it's as if everything is a blur passing by at incredible speed, rather than Amber viewing things at the same rate we all experience the world. Sort of takes another look at the timeline of the afterlife and the "How long is forever?" question involved there.
However, I did notice some problems with grammar. There were many occasions where plurals were not used, even though they were necessary. I also saw a few problems with the forms of words, like "do" instead of "does" in the sentence "Everyone do." There were a few other things scattered about, but those were the major ones.
Still, this is good. Grammar is something that can be easily corrected, while a poor concept is not. The idea behind this is creative and one of the few things I've seen pertaining to the anime that hasn't been done to my knowledge. (It's probably been examined somewhere, but the point is that it's rare.) Plus, Amber's thoughts are very believable, which is a very good thing in a monologue, for obvious reasons. Overall, nicely done. Just work on that grammar.
EDIT: Changed a couple of things I mentioned upon further reflection.