After ages of putting it off, I finally did it! Timer starts when 1-1 begins, and ends when I hit the axe on 8-4. Also, hope you don't mind the beginning too much (How I have my Wii menu choosing reset). It's my way of saying "I didn't cheat", as well as allowing me to restart right away after messing up lol. Enjoy!

1-1: Nothing special. I can't get 351, but I've never tried improving this route lol.

1-2: A little trouble getting the invisible coin blocks, but everything's fine.

4-1: For all I know, can't get higher than a 347.

4-2: Simple, nothing special.

4-3: 351 - I can't get any higher. Also, my luck's pretty bad lately - usually a bullet bill spawns one block above the platform for me, so I either have to slow down or take the hit. Not this time, though. =)

4-4: I slow down a lot when I see Bowser. He usually moves backwards then forwards in mid-air, so I just slow down to be safe.

5-1: I got stuck on the stairs. -_-

5-2: Nothing special, didn't die, hooray for me lol.

8-1: I was nervous about hitting the 2nd red piranha plant, so I ended up jumping too late in the beginning. Other than that, it went well.

8-2: I can't land on the box after the paratroopa on purpose. Doesn't make a huge difference, but I'd like to be able to land there every time lol.

8-3: I jumped too high over the last Hammer Bros, so I end up grinding against the hidden block. Other than that, no complaints.

8-4: In the beginning, the first podoboo usually kills me since he's almost always in the way for clearing that pit. Cause of that, I slow down. Other than that, I'm too scared to jump over Bowser when he's throwing hammers lol.

Definitely beatable, but I'm fine with this. (for now, anyways.) (less info)