Can you put some kind of turret in your level? Like a shooter?

Only if the tileset allows you to do so. You should have posted this in the JCS forum btw.

yes, somewhat,,

if you stick in like a regenerating hook or vine (vine, am not sure of,,), itll come out as shooting some kind of weapon (like fire, electro-blaster, pepper spray, etc),,

(am not on my own comp at the moment so cant tell you exactly,, may edit my post sometime this weekend)

You can use SCEs (single combo events) for stuff like turrets. This usualy involves an event that logically isn't able to generate with a regenerator on it, resulting in weapon fire from weaponse like seekers or bouncers being shot out of mid-air. For a full list of these events check out http://www.geocities.com/atlastsome/jj2/shj2.htm

Also, note that you should NOT use these events in MP levels unless they're treasure or any concept that has to be hosted under treasure, since if someone dies from gunfire from these events in MP they'll get an access violation.