Nice concept, great art, but...
Seriously, no gameplay AT ALL. I just got nearly 4 million, unlocked all the medals except the last one, and all I had to do was save up for the tank and maintain momentum with the AK. It's a great concept, but it needs to be much more interactive; perhaps by making the guns more versatile, or making the "obstacles" more varied in their effects. A target-based minigame could also improve replayability, which this game really needs. Still better than 90% of the games on NG, so please don't think I'm only being negative.