You can set the platformer behavior to your enemies and set the default control to "no". This way, the enemies won't move as you press the keyboard keys.
There is also the action "Start listening to user input" that you can set to stop to make sure the behavior is not supposed to move otherwise than it's coded.
It will even make you able to move them with the "simulate controls" action.
I haven't looked at your capx, it's 8megs and my connexion is really slow atm.
But honestly, the platform behavior should be the way to go I think.