Ball And Chain
This is a level which definitely isn't for beginners, but advanced-level players might get a kick out of this one. The idea here is that the ball needs to be kept in containment, because it can, and most likely will, hinder the initial construction of the tower. The Leap Hole gimmick and the balloons are both needed. Use them wisely.
Also, clouds.
Balls required: 22
OCD requirement: 2 minutes or less
Ball types: 3 (Common, Ivy, Balloon)
Fire: No
Water: No
Wind: No
Things that move: Yes