Crazy rat death

If you're my brother, surely you remember this movie. It was this crazy pseudo-animated flick that involved a kid from outer space going on a quest to recover his stolen magical flute. Or something. Right? And didn't it involve a freaky scene toward the beginning that involved the bad guys stealing the flute, and weren't there a lot of dead rats involved somehow? I remember that. It scared me.

The rest of you: find me this movie. I want to watch it again to see if it's as freaky as I remember it being. Next, I'll watch that crazy anime version of Jack & the Beanstalk that I watched 20 times a day when I was 5.