This is actually really cool!
Don't be discouraged by any low-votes or negative criticisms if you get either. You succeeded in practicing, and it takes guts to show off your first flash.
...and all things considered, this is actually pretty complex for a first time run on the program. See my first flash for yourself...this has much more complex frame-by-frame in it.
The only think you need to work on is getting that consistency down; when tracing the shape of the body, every frame that's different is noticable in play back, as I'm sure you're aware. It's that "wobbly-ness" as it's moving. This is a natural illusion when it comes to frame-by-frame animation, and I've been at it for a while and I still have problems.
all it takes is practice.
There are tools in flash to help you out with this; the onion skins and outliners to help you trace lines exactly, or know when to start moving the line to your specifications. The closer the lines are, after each sequential frame, the smoother the animation. The farther, the faster.
...I may not be illustrating the point as clear as I've been taught. But if you want to really step up your game and learn about animation, I also STRONGLY, STRONGLY URGE YOU to pick up "The Animator's Survival Kit", which is a book by Richard Williams. Not even kidding dude, it is a WEALTH of information and expertise.
Keep at it! Keep practicing!