It's Okay
Unlike the person below me, I don't think this is frontpage worthy. There is also much improvement that can be made.
Could you add other icons for viruses? For example, you could create some for the most common viruses on the web today. Then, instead of just shooting a red windowns icon, you would be shooting any actualy infection. Doing that would make it look awesome!
For the guns, instead of having actual guns, could you try creating them to represent current Antivirus software on the market? Having the guns symbolize certain programs would be awesome. AVG, Ad-Aware, Synmatic, ect.
Those are both graphical improvements.
Could you add some more powerups though?
Shield: Creates a true Firefall around the computer destroying the first virus that hits it. After that it disapears.
Mine Freeze: Stops the mines' movement for 10 seconds.
BTW: Instead of calling it Anti-Virus 3, call it Anti-Virus 2, Beta 2.
Take any suggestion you want. You don't have to do any of them, but they would make the game look and play better.
*Made Highscore List tieing with first place.*