Darn! I'm stuck at level 63 flyers on the 100 challenge. Can't even get far enough to need the juggling. :) I need to train my DTD skills.
The problem is: if I concentrate on the flyers a couple of the spawns get past me every time. Do any of you press the "send next level" twice in a row just after darks come in so that you won't get a hassle in the middle of the screen when the flyers get there?