Bow movement

Vijjeswarapu

My bow is moving but not moving softly and it also moves from 90 to 360. I don't want to move my bow towards backside ,I want to limit to only front side(some thing like bubble shoot game). Please help me in this
I have kept rule as if touch
Rotate to Angle min (15,max(-15,vector to angle(game.Touch.Touch1.x-self.positionx,game.touches.touch1.y-self.position.y))
rule touch released
spawn arrow