Argh, I forgot how much I hate 5-8. Makes no sense that I can do 1-K no problem, but 5-8 of all levels is still giving me trouble in terms of getting all the letters in one run (I remember it giving me trouble in the Wii version as well). Getting that "N" is just so damn difficult.
On another note, I'm a huge game music aficionado and somehow the soundtrack didn't really jump out at me that much when I played through the Wii version, or at least it wasn't very memorable to me. Playing the 3DS version with headphones, though, has opened my eyes (well, ears) to just how excellent this game's soundtrack really is. It's got just the right mix of nostalgic remixes done well and completely new material... it's just really good. The remixed forest theme is just way too awesome.