Character - Collider With Scene

Hello,

I'm working on my own character controller, this is the first time I've ever done anything like this, so be easy with me.

I'm working on a simple top down game, where the character moves where the mouse is in the scene. I got all the movement working, thats all fine. What I'm trying to do now, is for the character to collider with objects in the scene.

So, I've added a collider to my player, and a rigidbody and turned off gravity (as I don't really need it in a top down, no jumping involved).

Now this works, I do collide, but then my character starts rolling, and rotating and moves backwards, out of control basically. So then I tried turning on some of the Constraints on the rotation, this works, my character doesn't lose control, but it seems like theres a force continually being applied against my character, causing him to move backwards.

Any ideas how I can have my character collider with the scene? Without losing control?

I'll attach my script and continue to look around, but I'm basically just using 'Translates'.

 function Update () {
     
     //makes direction arrow stay with character - on x and z axis only
     playerArrow.transform.position.x = transform.position.x;
     playerArrow.transform.position.z = transform.position.z;
 
     
 
     var ray = Camera.main.ScreenPointToRay (Input.mousePosition);
     
     var hitdist = 0.0;
     //get the point along the ray that hits the calculated distance.
     var targetPoint = ray.GetPoint(hitdist);
 
     var lookPos = targetPoint - playerArrow.transform.position;
     lookPos.y = 0;
     var targetRotation = Quaternion.LookRotation(lookPos);
     playerArrow.transform.rotation = Quaternion.Slerp(playerArrow.transform.rotation, targetRotation, arrowRotateSpeed * Time.deltaTime);
 
 
     // ----- Move Character ----- \\
     
     if(Input.GetAxis("Vertical")){
         //rotate player to face direction arrow
         transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, playerRotateSpeed * Time.deltaTime);
         
         //them move player towards arrow direction
         var translation : float = Input.GetAxis("Vertical") * playerMoveSpeed;
         translation *= Time.deltaTime;
         
         transform.Translate(0,0,translation);
 
     }
     
     if(Input.GetAxis("Horizontal")){
         
         var panning : float = Input.GetAxis ("Horizontal") * playerMoveSpeed;
         panning *= Time.deltaTime;
         
         transform.Translate(panning,0,0);
 
         //pan the character left/right whilst looking at mouse position/direction arrow
         if(allowRotatePan){
             //rotate player to face arrow
             transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, playerRotateSpeed * Time.deltaTime);
         }
     }
 }