Dude, I beat it! You just gotta wait for like a minute and a half or something. (I just open a new tab and go on the forums :P) and then the front base will fall down by itself! Then, just attack the back base with the purple vase thing.
Freeze ball is good for making strong wall types brittle and easily destroyed. For most levels of freeze ball, you hit the castle with freeze, then go to the triple bombs and destroy it.
I havent been on AG in awhile, when i did finally come CtC2 is out and its awesome. I feel lucky, if I had come a bit later, after some more games had come out, I wouldnt of known. Did I mention CtC2 is amazingly awesome?
Also, is there the different hieghts of walls and lenths of floors in this ones level editor, I only got to look at it for a minute but i didnt see them.