Errors in unity with a movement script

okay so i got this little problem, i have created (tried at least) a movement script with the abilty of pushing objects with rigid body's and a spawnpoint for my character per lvl. i have no experience since im a freshman at college. i think it's just a noob error, since unity wont allow me to use the script since it "doesnt exist"

i named the script pps.cs

using UnityEngine; using System.Collections;

 public class playermove : MonoBehaviour {
     public float pushPower = 2.0F;
     public float movementSpeed = 1.0F;
 
     void OnControllerColliderHit(ControllerColliderHit hit) {
                 Rigidbody body = hit.collider.attachedRigidbody;
                 if (body == null || body.isKinematic)
                         return;
         
                 if (hit.moveDirection.y < -0.3F)
                         return;
         
                 Vector3 pushDir = new Vector3 (hit.moveDirection.x, 0, hit.moveDirection.z);
                 body.velocity = pushDir * pushPower;
         }
     // Use this for initialization
     void Start () {
         //player spawn point
         //this is where our player will spawn.
         transform.position = new Vector3 (85, 1, 55);
     }
     
     // Update is called once per frame
     void Update () {
         transform.Translate(Vector3.right * movementSpeed * Time.deltaTime);
         transform.Translate(Vector3.left * movementSpeed * Time.deltaTime);
         transform.Translate(Vector3.up * movementSpeed * Time.deltaTime);
         transform.Translate(Vector3.down * movementSpeed * Time.deltaTime);
     }
 }