There are some effects that I didn't really like visually (like at 0:39 that "blink" transition whose angle just changes for no reason ? then 0:42 that splatters/fade transition; and there is this kind of white halo that is just too visible and hides too much of the picture i think).
Oh, and sometimes you have some characters when they should not
And finally I think it could have been more dynamic when the music starts changing at 1:44. Same for the ending : even though I find the change of pace is better, there are too many planes
, you could have used more different kind of scenes for more diversity (but then I don't really know the anime, so I don't know what kind of scenes you had ^^).
Overall I liked it even though I think it was somewhat slow sometimes. The choice of music and anime gives a nice athmosphere.