Yes, and I took my sweet time with it.  The hardest one for me was the first level, mainly because I had to get used to him being more like a flighty moth and less like Meat Boy under the worst possible conditions.

The second level wasn't that bad, it was all just setup and timing.  I didn't look really as much as felt when to rush back and forth.  I actually had more trouble trying to figure out the middle jump than the third elevator that everyone screams about.

The third level was annoying.  I'm on a keyboard and I swear that my space bar leans to the left from Super Meat Boy.  I'm glad it's over with.  The Kid is my second favorite unlock after Jill.