Ok, I've passed all of Crazy. It took a while (~2 hours), not because any of the levels were difficult, but because so many of the levels are long and involve just straight building. "The Mexican Wave" is the worst offender here: all you do is build, build, build with no thought necessary and it takes 9 minutes.
Even if you'd choose to keep many long builder levels, at least put breaks in between. They're tiring and tedious, so it's better to split them up with some shorter levels interspersed.
I don't want to be all negative feedback here, so I'll mention that I liked Crazy 17 (I forget the title).
I do hope that there are fewer builder-intensive levels in Wild, Wicked, and Havoc, although Wild 1, Wicked 1, and Havoc 1 are all builder levels, which didn't restore my hopes :tongue: The point isn't that builders are inherently bad, there are plenty of good builder-intensive levels. It's that they are often used in excess to make up for a level with no puzzle. For example, "The Swamp" has no puzzle element, it's just long. You don't usually see levels that involve no building and have no puzzle element. They exist, but they don't pretend to be difficult and/or are over in a minute, so you forget about them.
EDIT:
Finished with Wild. The levels here (esp. 1-8, the repeats) were a bit better than the Crazy ones, though still a number of puzzle-less long building ones. From this rating I liked Wild 3 "5 Ways To Get Through", just because :tongue:
Also, a couple of bug notes. Tame 4 and its repeat Wild 4 are bugged (game hangs). Wild 14 is also bugged (sound + visual glitch, exiting level hangs the game). These bugs are usually caused by objects out of bounds or invalid objects.