Its okay..
This isn't horrible or anything, and it sucks that your computer has sound problems cause sound makes flash films a lot better and people get more into. Its pretty good beginner sprite animation but some of it seemed sloopy. Try to add more movement in the film, such as the fighters going to the left and the background scrolls a bit so you can see where they are at in the stage. More special moves, thats always pretty cool. Um, not really sure what else to say. Its not 'omg bad' but you still have a ways to go to reach 'awesome'. Good luck on your next films, and hopefully you can fix that sound issue or find a way to get around it.
Oh and the text kind of seemed too fast at some points, try to add a button so that the viewer can click on it to keep the movie going or try to keep good timing for text if you want people to read what they are saying.