This footage is from the version I turned in for class. The mana regen rate is increased so that the person playing wouldn't lose as easily, but I actually balanced the game so that it would be a close finish.
I didn't have time to refine the exploration I was doing with the audio visualization plugin so this game just spews a steady stream of 'fire' at the tank and random damage in all of the other lanes. If he dies, the stream moves down the rows until everyone is dead.