Local-Global error.

chicka123 : Oops. Heres the script

 var moveSpeed : float;
 var turnSpeed : float;
 //var jumpForce : float;
 
 
 function Update(){
     if(Input.GetButton("Forward")) {
         transform.Translate(transform.forward * moveSpeed * Time.deltaTime);
     }
     if(Input.GetButton("Backward")) {
         transform.Translate(-transform.forward * moveSpeed * Time.deltaTime);
     }
     if(Input.GetButton("TurnRight")) {
         transform.Rotate(transform.up * turnSpeed * Time.deltaTime);
     }
     if(Input.GetButton("TurnLeft")) {
         transform.Rotate(-transform.up * turnSpeed * Time.deltaTime);
     }
 }

$$anonymous$$e : Comments guys, comments !

Check out Translate's doc, the default Space is Self. If you translate localy of transform.forward, you're applying the rotation twice.

 transform.Translate(Vector3.forward * moveSpeed * Time.deltaTime);
 // or
 transform.Translate(transform.forward * moveSpeed * Time.deltaTime, Space.World);