This flash is pretty lacking, it works fine as a game and it's not hard to learn, so I can say that the game itself is alright, though a bit repetative after a while and could do with a few power ups or more difficult opponents as the game goes on.
From the looks of everything else, it's not very nice, the backgrounds are photos when really you should draw your own just to show off what you can do. The menu isn't very nice looking, you could draw the background and make some real buttons with text on and a font that fits in better than that script style font.
But overall, if this is one of your first games, then it's pretty decent, you can still improve, just work on looks and don't use photos for backgrounds, it makes it look very fake. But keep working at it :)