Well...
It's not very good. I know this was probably meant to be some sort of political statement, but honestly, it's on newgrounds, it's marked as a game, so it should be fun. Which it really isn't...
The hit boxes should've been more isometric--that is, the keys shouldn't free the prisoners just because the two sprites collided. If I was significantly closer to the screen (which would look lower) then keys shouldn't free the prisoners for hitting their feet when in actuality the key would have gone past the prisoner because of the difference in their z coordinate/depth.
And, of course, there's the problem that it's repetitive and uninteresting. But again, I can see you were trying to be political, so you probably didn't pay much attention to the function of the game itself. But could have done both; for example you could have added other characters like Al Gore, George Bush, Dick Cheney with a rifle, etc.