i can't click the object build on pc vr game googlesamples

well i have download vr game googlesamples

when i build to pc and run it i can't click the object and i can't look arround

so i put a LookArround.js script to Main Camera for look arround

look arround fixed but i can't click the object

i just can't click an object, i dont change any code from sample, i dont have tried changing anything because i dont know what to change to make it work, i just put a lookarround.js to main camera

here the lookarround.js :

 #pragma strict
  var x_rotation : float = 0.0; 
  var y_rotation : float = 0.0;
  
  var x_sensitivty : float = 5.0;
  var y_sensitivty : float = 5.0;
  
  function Update ()
  {
      x_rotation += Input.GetAxis("Mouse X") * 5.0;
      y_rotation -= Input.GetAxis("Mouse Y") * 5.0;
      
      transform.localEulerAngles = Vector3     (y_rotation, x_rotation, 0);

any solutions to fix that ?

Please help me :) for my research study