I greatly liked the game! The graphics are unique, the sounds fit the game and the gamefeel (and options such as azerty) feel really good!
My only small ciritcism would be waht Matt Glanville already said, "One change I would like is some audio feedback when the green indicator appears, so I could just listen out for it rather than keep looking away from my crosshair". Would just enhance the feeling more for me!
Great job!