so, what I did was (A) Set up 5 or 6 launchers. (B) Get the valves up (C) Buzzsaws above launchers and turrets at sides. (D) Hammer. The turtles clip through buzzsaws and OMEGA COMBO themselves straight to hell.
I love this game, but I keep seeing half the screen load the previous (i.e. upgrade screen half, sttage select half) It's hard to play when you can't see what you're doing.