Not Much Of A Fan Of Sprites ...
... but you asked for a review, so here's a fair one. Though the sprites are already drawn for you, you still have to rip them from somewhere, put them in the proper sequence and get rid of any and all bounding boxes that encompass them. That takes some work so I admire your dedication and talent for being able to make a story with the characters as they're presented. Overall, the cartoon looks very good.
My only negative crit is your spelling and grammar. I understand that English is not your first language (Brazilian?) and your usage is far better than some Americans I know, but, if your cartoon is going to rely on text to tell the story, then the spelling and grammar should be perfect. Find someone who speaks and writes English well to help you correct your script. If you can't find anyone, you can always e-mail me (my address is in my profile). Also, you should leave the text boxes up a little longer so the average person can read them.
All in all, your cartoons are interesting. Fix the spelling and grammatical flaws and your work will really shine! Best of luck!