New to Flash?
I liked your game, your concept of 'Virus Hunting' was more so 'Virus Avoiding' but nice try anyway. Nothing amazing in the graphics department, or sound for that matter... but I did like your loop.
I'm assuming this is one of your first games. (Obviously there was a Virus Hunt 1 I'm guessing). No, I haven't played VH1, only this game, so I could be missing something.
One thing I noticed is that in the instructions, it depicts the object which you control in the game. By accident I clicked on it and found that I could not click the button to cycle through them. I then had to refresh the movie. Apart from that and the graphics/sound, I think that's all that really needs improvement. Sorry if anything I've said sounded offensive, it was not intended to be.