oh a cut version. i know what you've done here but i wont tell anyone xD
first:
re-sized version is better imo. scale them in flash before exporting to prevent pixelate images
but yeah.. file size issue, you should reduce some loop animation in there and delete some unnecessary looping images
00:12:599 - i think you should animate this in osu rather than loop images
00:18:411 - Reimu shadow missing here
00:20:474 - (f2.png) fade? no no no... delete that fade
00:54:130 - (reimu-pu.png) another missing shadow
00:54:599 - (bg3.png) wrong animation.. it should be quick slide from right to left
00:56:942 - (442.png) it stops too early than the bg
00:58:724 - the bg shouldn't move here and zoom out a bit
01:17:474 - the balloon is too small
01:46:724 - where is the sun fx? ~ from up right corner
01:50:474 - kill the bg movement
02:17:474 - fade out to black is better than bg
Fix them:
sblr.png - left eye part
sbsqsq-000.png - identical to sq-001.png ~ 1 square?
sbmbbbb5.png - ribbon
overall its good but i think you need to be patient more :)