Duck Hunt type shooting tried search, can you help?

I have experimented in GE with no success, I'm very new to this. But I want to create a sniper/shooting game like shooting ducks at fairground simple stuff for some, i assume
What I need is a way to have a crosshair that scrolls over a large parallax area in 360 and lets me shoot my duck/target actors.
I would also like it to take a longer amount of time for the bullet to reach targets further away if possible like different areas activate when crosshair/player enters area, some wind and slight crosshair sway movement would be usefull too
but any help or sample code would be appreciated.
Thanks,
Scythe

What I need is a way to have a crosshair that scrolls over a large parallax area in 360 and lets me shoot my duck/target actors.
I would also like it to take a longer amount of time for the bullet to reach targets further away if possible like different areas activate when crosshair/player enters area, some wind and slight crosshair sway movement would be usefull too

Thanks,
Scythe