Ok, got all medals exept "007", an unfair medal, because once missed you never can get it.
The concept is nice, the graphic could be better but its good enought too enjoy the game, the game really has an issue with jumping as LinkinAnneww says. Aiming your gun as Boredude says would ruin the whole basic-concept I think. I dont played with sound so I have no opinion on that part.
What I really liked was the challenge of the game, very ballanced and hard (if you want the medals)
All in all it could need some work, but your on the right way