I had a crack at finishing it. and for those who don't wanna download it, just look I took a screen of his level aswell.
Original
http://i10.photobucket.com/albums/a1...levels_his.png
My Version
http://i10.photobucket.com/albums/a1...ucklevels1.png
http://i10.photobucket.com/albums/a1...klevelsbig.png
There was a few tile errors in your level Knuckle's so I had to fix them. and I had to use treetop.png in there :/ because I didn't really wanna change major lanscape (upper left). and I didn't feel like changing the path either.
If the link don't work try copying them into the address bar.