We have atan, can we also get atan2? It´s pretty useful for getting the movement angle based on velocity.
This should also be added to behaviors that use velocities, e.g. right now there is no expression to get the movement angle of a physics object.
angleInDegree = Math.atan2(obj.velocity.y,obj.velocity.x)*180/Math.PI;
The existing angle() expression calls atan2.