Nice game
I like the idea, its fun and interesting.
Some modes/features to add for a possible sequel:
==MODES==
>Target practice mode
-You choose the set distance/height of a single person being hung, and practice getting your shots right.
>Dummy mode
-(could just be apart of the target practice mode) You just shoot a guy hanging as much as you like, let out that frusteration.
>Level creator
-A mode to design your own levels (include a sharing system)
==FEATURES==
-Different music tracks (current one is nice, but its extremely repetative)
-Different arrows/bows with different effects
-Varied people (the same guy gets old)
Thats all i can think of now, just some possible additions that came to mind as i was playing.
Weither you make a sequel or not, i enjoyed the game alot :]
Great job.