Give the guy a break.
It was decent, that's all i gotta say. It was better than anything i could make. As for the guy before just give the author a break -- he tried dude. Anyway good luck with your next game, here are some suggestions.
1) Multi Targets and Faster Missles (as was said before)
2) Recoil recoil RECOIL, no sniper rifle fires a straight shot like that
3) Perhaps the scope shaking a bit, just a BIT, to represent the hands and the pressure.
4) No Time Limit Perhaps ( I never ran out of time playing this so you could save yourself the effort next time).
Anyway goodluck.