Problem after building

Tough to say without knowing more about the project. Do you have multiple cameras? Is your controller script maybe forcing your camera to look up when you move?

First, try looking at the log file for your build. Then, add a bunch of debug statements to your camera controller script. If you can narrow it down a bit, we can probably help you.

I have no multiplay cameras in the scene. Here is my movement script:

 using UnityEngine;
 using System.Collections;
 
 public class $$anonymous$$ovement : $$anonymous$$onoBehaviour {
     //Variables 
     public float gravity = 20.0F;
     public float speed = 6.0F;
     public float jumpSpeed = 8.0F;
     public float vScale = 1.0F;
     public float crchSpeed = 3F;
     public float runSpeed = 1.0F;
     private Vector3 moveDirection = Vector3.zero;
     
     //Camera
     public Animation run;
     public Animation cameraidle;
 
     void Update() {
 
         
         CharacterController controller = (CharacterController)GetComponent(typeof(CharacterController));
         // is the controller on the ground?
         if (controller.isGrounded) {
             //Feed moveDirection with input.
             moveDirection.Normalize();
             moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
             moveDirection = transform.TransformDirection(moveDirection);
             //$$anonymous$$ultiply it by speed.
             moveDirection *= speed;
 //            Animation.Play("cameraidle");
 //            Animation.Stop("run");
             //Jumping
             if (Input.GetButton("Jump"))
                 moveDirection.y = jumpSpeed;
             if (Input.Get$$anonymous$$ey ("left shift"))
                 moveDirection *= runSpeed;
 //                Animation.Stop("carmeraidle");
         
                 
             
         }
             
         
         moveDirection.y -= gravity * Time.deltaTime;
 
         controller.$$anonymous$$ove(moveDirection * Time.deltaTime);
 
 
     }
 }