After Effects has a lot of similar features to Flash. The base artwork is made in Illustrator and animated in After Effects. AE lacks a few features I would find really useful, such as shape/motion tweening... still trying to figure out a way around that one. Currently using it to make another animation, so we'll see how that turns out.
Wahey, there it is! I was looking forward to seeing what you'd come up with, haha.
Good song choice, I'm gonna have to hunt that one down on the net now.
Since it's relevant, I've been collaborating with a talented chap who knows his noises and thus there is an official sound-enabled version of this loop which I hope to publish this weekend, maybe. Moar Derpy for all of us!