A genuine effort, although it still needs some work.
The direction and flow of the shots is actually well done, and definitely a step up from your previous work; in fact, the whole thing functions quite well as an animatic or a rough draft, but it would be even better if the line quality was smoother and cleaner.
I think 40 is the best smoothing, since it's not too rough, yet Flash typically doesn't mess up the lines you draw in 40 smoothing. The line quality here varies from fairly small to very thick, I'm talking specifically about Dexter's tail at 0:34.
The shot right after that at 0:38 is unnecessarily wobbly, and it would be a big improvement if you just kept one of the frames, though instead this gives it a sort of amateurish feel. Some of the frame-by-frame animation could use more inbetweens - the more, the better it looks.
In conclusion, it's a genuine effort and a step up in terms of direction and flow. The only thing that needs work at this point is the animation, specifically the line quality. Good luck on your future projects.