Not a bad first shot
This exceeds a lot of other "my first flash movies" just because it's not five seconds long and without a conclusion. A lot of the major flaws in this are easy fixes. Drawing a quick background, for example, adding sound and play buttons. The shading on the characters and occasional FBF animation was a nice touch, but you kept turning you characters into three motion lines as a crutch. :(
If my four out of ten seems harsh, keep in mind that zero stars represents the worst flash and ten is the best, so four seems to be an accurate placement of this film according to that spectrum.
You do have potential. keep working and best of luck.