Wow this looks awesome!
There's a few things I noticed/would suggest though. :3
-For the transition between the intro and my track, I would slow zoom into the picture frame. Not by alot, just enough for the picture frame to take up the full screen and then do a soft short crossfade into my track.
-There's a weird flicker at 0:35 which I'm pretty sure shouldn't be there.
I don't know if it was a rendering problem or a problem with the file.
-A longer crossfade between Steins Gate and HOTD track. EDIT:
Actually I don't know if I remember correctly but the first scene of the HOTD track...the bike is originally offscreen right? Perhaps you could mask the bike zooming into the eye as a transition. But uh..yeah I can't really remember so if I'm wrong just ignore it. XD
-I think the ending scene of the HOTD track could be just a tiny bit longer and the black fade longer too. If necessary, crossfade the black fade out of HOTD and the black fade in for Yumekui Merry.
-I'll agree with kireblue about crossfading FS and Allykat's track. Or you could try something similar to an overlay fadeout.(what you did between Hagaren's pokemon and Pan's sailor moon track in the Cascadathon MEP.)
-And I like the last 2 transitions so no comment about them. :3