*

Assets/Scripts/CrossHair.cs

@@ -27,7 +27,7 @@ public class CrossHair : MonoBehaviour {
 	
 	// Update is called once per frame
 	void Update () {
-		var ray = camera.ViewportPointToRay (new Vector3(0.5f,0.5f,0.0f));
+		var ray = GetComponent<Camera>().ViewportPointToRay (new Vector3(0.5f,0.5f,0.0f));
 		hasHit = Physics.Raycast (ray, out hit);
 		if (hasHit) {
 			target = hit.point;

Assets/Scripts/CrossbowArrow.cs

@@ -42,7 +42,7 @@ public class CrossbowArrow : MonoBehaviour {
 						hitName = "HitGlass";
 					}
 
-					GameObject hitObjSrc = physicsHits.transform.FindChild(hitName).gameObject;
+					GameObject hitObjSrc = physicsHits.transform.Find(hitName).gameObject;
 					GameObject  hitObj = (GameObject)Instantiate(hitObjSrc);
 					hitObj.transform.localPosition = hit.point;
 					hitObj.transform.rotation = Quaternion.FromToRotation(Vector3.up, hit.normal);

Assets/Scripts/PlayerController.cs

@@ -23,7 +23,7 @@ public class PlayerController : MonoBehaviour {
 
 	// Use this for initialization
 	void Start () {
-		cameraObject = gameObject.transform.FindChild ("Camera").gameObject;
+		cameraObject = gameObject.transform.Find ("Camera").gameObject;
 		rotateUpDown = transform.localEulerAngles.x;
 		rotateLeftRight = transform.localEulerAngles.y;
 		c = gameObject.GetComponent<CharacterController> ();

Assets/Scripts/Utils.cs

@@ -3,7 +3,7 @@ using System.Collections;
 
 public class Utils {
 	public static GameObject FindChildRecursive(GameObject obj, string name){
-		var child = obj.transform.FindChild (name);
+		var child = obj.transform.Find (name);
 		if (child != null) {
 			return child.gameObject;
 		}