Rotate a GameObject without affecting the direction of motion?

Hello Devs,

STATEMENT:

I am creating a mechanic of an object falling down under the action of gravity. I then control it by tilting the iPad and evading the obstacles on the way down. I am scripting for the object and I wanted the object to rotate left a bit if I move left, right a bit if I move right, up a bit if I move up and finally down a bit if I tilt the ipad down. Now the whole point is the object has to restore to its neutral position if it is not moving on it's respective side.

CODE :

     if(MOVE)
     {
         dir = new Vector3(-accel.y, 0 , accel.x);
         //Limiting the 'dir' variable to magnitude 1;
         if (dir.sqrMagnitude > 1) 
             dir.Normalize();
         
         //Moving the object at a velocity as defined in speed
         transform.Translate((dir.x * speed* Time.deltaTime), 0, (dir.z * speed* Time.deltaTime),Space.World);
 //I tried rotation and look at function, but it does not seem to work fine.

         //transform.LookAt(dir);
         //transform.Rotate(dir*Time.deltaTime*25);
     }
         

PROBLEM : It does not rotate. Even though it does, it does not regain the normal position nor is the rotation fluid.

Your help is much appreciated.

Thank you.

Karsnen.