This game might not be complete crap if the gun had ANY use at all.
Maybe make it destroy a block if you can kill it before it charges at you? Gun does more harm than good most of the time, making a virus come at you when you don't have room to dodge it.
Not too bad, but I think if you could swing on both sides it would be a huge improvement. Sucks trying to get someone going towards the top of the screen. 2'd.