Crowning Moment of Heartwarming: The ending, where the musician gets his long belated check for his song, which allows him and his wife to live on top of the newly constructed skyscraper (complete with a garden on top), which Hoppity and co., after all the hell they went through in the film, end up happily residing in at the very end.
Germans Love David Hasselhoff: As noted above, it was a major financial failure in its home country of the United States, where it remains obscure and unpopular. In Japan, however, it's considered an animation classic- Disney's DVD release in the country was produced by none other than Studio Ghibli, and at the 2003 Laputa Animation Festival in Tokyo, a group of 140 animators deemed it to be the 13th best animated film ever made!
Ugly Cute: The characters, arguably. As one Fleischer animator named Howard attests:
"You can draw a bug and make it cute as hell—as cute as a bug's ear, in fact, but I though those characters designs were gruesome. Hoppity has a big, bloated head stuck on a skinny body."