Challenge 3 - First Strike

I am writing this on my palm pre. How awesome is that?

So my idea is this. You play a hacker in a green vector cyber space. With the one button, you can do two things. If you press it, you can fire off bandwidth beams to damage opponents. The beam can also be modified with different viruses which cause damage over time, slow you down, etc. If you hold the fire button, you project a firewall which deflects beams. If you have a specific virus, the firewall will deflect the one you have if an enemy shoots you with it, but other ones will pass through and infect you.