I feel as though head shots should have more worth than arm shots. Maybe make an option where you can shoot the dynamite in the bomber's hand to blow him up.
At one point there were headshots, but I decided to remove them because:
1 - it was either too easy or too hard
2 - there was never a good balance for the amount of points it would reward
3 - I ran out of time
It's likely I'll never fix any of these issues, but I still appreciate the feedback.