Press the space bar to fire and numbers to switch weapons. Changing mode will change the target type Red targets=insta-kill Purple targets=20 hp Press numbers to switch weapons. 1=pistol 2=minigun 3=RPG 4=gravity gun (Move targets by pressing space) 5=portal gun (bullets teleport to other portal pointing towards mouse) Poke around a bit, maybe you'll find a few secrets ;)
