Nice just a little bit loud. And a little more music variation would be nice.
The sirene should have some effect. It's just annoying.
At least the graphycs are good, the controls are responsive, the missions are various. But doing the same mission 3 or 4 times only just in other surroundings... And in the last heli mission the distance meter starts outside the screen. It's bad.
So the game is fun and looks good but can use some more refinements.