Wow, a real sudden change in mood. :\
Yup, the mood of the song really changed when you went from a hyper energetic theme to the Dire Dire Docks remix. In my opinion, you should have just kept the Dire Dire Docks's remix (Not saying the first part sucked, it was pretty cool actually) or add a smoother transition in between the two parts. But, it was interesting to hear an originally slow song turned into a hyper speeded song. I can just image Mario Characters racing underwater with this song playing in the background. Lol. XD I hope you continue to do video game remixes! :D
I went through many trials to get exactly what you're talking about and it just wasn't working out. I'm still learning techniques and transitions and whatnot. I eventually just gave up which is bad, I know.
Thank you for your comment and if more inspiration arises, I may just keep doing it.