Good Concept
I see so much potential in this game. You could have blown us away.
To couple with such a fixed click interface, for one you could have made your graphics look much more convincing and detailed. Perhaps animating the figures could have made the 'movie' much more engaging. Better sound, different registers of pain for each soldier could have been a delight and somewhat satisfying for the few. Effects such as blood, more movement and different enemies could have given the flash much more of an interest. Different paths, the power for us to make decisions on which path to take would have given the flash a more dynamic gameplay. Going through layers, such as different stages or levels would have given us something more to look forward to. A castle for example would have required us to take down gaurds, cross a moat, take down archers, knights, more gaurds until you made your way to the king. More engaging audio and background sounds of medieval war could have brought this flash to a whole new unique realm.
Your concept here is nothing original, but it could have risen to something spectacular and profound. It could have been the best at its category, and earned respect becuase of that. I hope you will blow us away with something amazing and something we've never seen before in your next flash.
Looking forward to seeing your improvement.