Pretty good
One of the better "Walk-and-Thump" or "Beat 'Em Up" games I've played in Flash.
I agree with most of the things that Electric Blue said but I'll add:
-The problem with the guy in front being hit at the same time as the guy behind can be fixed by using an independent movie clip to do the hitTest.
-Sometimes, the enemies fell over before I got up
-It would be nice if there was a "sweeping" attack. (Something which can be done at anytime, take out guys both in front and in back of you but takes life away.)
-Different backgrounds, different music, and more opponents at the sametime.
(Which version of Poser do you have? Can we have a Velocoraptor in it.. :P )