You might have something here
I played a couple of game and this game have potential!
If you could take some times to develop this it might make a really interesting game, maybe consider have an artist help making the game more appealing to the eyes ( what about a realistic city, with real people moving, and the blurry night vision UAV vision that would be really cool with different weapon.
Also a story line with game mode would be cool, story mode, challenge mode etc... with min. civilian or building dmg, or with multiple target etc...
Also the damn music is annoying as hell!!! maybe more then one loop or whatever
I understand you did this in very few hours, i know that what i said require a huge amount of time both for the arts, the concept and programming, but it could make one hell of a game. Keep up the good work!