I can't think of much to add to what I said on the WIP board:
"This is really impressive stuff, and not just because of the professional production values. You've taken some quite sparse, minimalist source material and turned it into something much more expansive. Medleys can sometimes feel a bit random, but the progression here feels totally natural. I think I'd even go so far as to use the word epic."
This mix has given me a new appreciation of Flashback's score, which I've never been very familiar with despite it being one of my favourite games. Looking forward to hearing the new material djp mentioned in the writeup.
Edit: Okay, so the transitions are basically non-existent. Even so, the shifts in mood seem, to me at least, pretty natural, taking the listener on a journey - albeit a slightly bumpy one.