I'm at the beginning of the level. I just collected Nub's part. I now need to jump into the power current to get to the top on the platform above. Only, I can't get to the top without hittings the sides and being pushed to the bottom. I can't seem to do it. Is there another way to the top or does anybody have any advice. Help!!!! Thanks

When you get in the place where you float, make sure you're in the middle of it. You may have to load a few times but it's possible. You don't go to the room straight across from you. You'll get there later. You float to a room above you. When you're floating, hit the alt key. Then turn around, and tap the alt key and so on until you just hold the alt key and you land on a platform. Hope this helps.
-tadmaz