i really liked the ending, very original
infact the whole story was pretty original with lots of different ideas.
my only criticism would be that u explain too much, if u know what i mean (dont worry, i'm not 100% sure what i mean!) but i think that sometimes the characters say thing that are already obvious. and out of 22 (i think) chpters, that is my only criticism
i envy u for the way u introduce new ideas and never seem to be unclear about where the story is going. i myself go through stages of not writing my fic, just cos i get bored or am afraid of which direction to take it, incase i regret it.
and finally, thanks for writing it. it was great to read and a great way to relax and take my mind of exams