Answer:
I shoot but never kills
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I turn everything around, but I cannot move. When you see me, you see you! What am I?
Curtail me thrice I am a youth; behead me once a snake; complete I'm often used in truth when certain steps you'd take.
I help engines spin and pants stay up. What am I?
I go in hard come out soft. Blow me hard and I’ll make a pop.