Just to let you know, this review is mainly focused on the WIP preview itself, just so you can fix things that aren't right.
The animation is definately an improvement from your Stick Skits days, but it still feels amatuer to me. First off, when you're doing frame-by-frame animation, I'd recommend turning on onion-skinning to make doing it easier. Also, the lines look really bad, mainly because you're using default brushed. While this works for some (specifically Animation Wheel), it doesn't work here. I'd reccommend going to a bigger brush (and also zooming in to get thinner, but better looking lines. And if you want to also, you can turn on pressure sensitivity to make the lines look even better. One more thing is that I'd recomment working on an animatic for the video first before starting work the complete animation, just so you can get an idea of what the animation would be like. But hey, it's probably your first time animating something legit with Flash, so take your time and practise with the tools before going head first into creating a big series like this. That, and you can also look up Flash tutorials to learn more about how Flash works, and what you can do with it. I know you've created shit before, but I still have hope that you'll become a good animator.
Keep improving, and having fun with what you do! ;)