All compiler errors have to be fixed before you can enter playmode!

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class ball : MonoBehaviour {
5.    
6.     public float ballVelocity = 3000;
7.    
8.     Rigidbody rb;
9.     bool isPlay;
10.     int randInt;
11.    
12.     void Awake ()
13.     {
14.         rb = gameObject.GetComponent<Rigidbody>();
15.         randInt = Random.Range (1,3);
16.     }
17.    
18.     void Update ()
19.     {
20.         if(Input.GetMouseButton(0) == true && isPlay == false)
21.         {
22.             Transform.parent = null;
23.             isPlay = true;
24.             rb.isKinematic = false;
25.             if(randInt == 1)
26.             {
27.                 rb.AddForce(new Vector3(ballvelocity, ballvelocity,0));
28.             }
29.             if(randInt == 2)
30.             {
31.                 rb.AddForce(new Vector3(-ballvelocity,-ballvelocity,0));
32.             }
33.         }
34.     }
35. }

Hello guys i have another problem with my project, i wrote all the scripts but i cant even enter a playmode. so i checked everything but without any difference so please help if you can here is some pictures of my work:

 

Post your actual scripts here using code tags:
http://forum.unity3d.com/threads/using-code-tags-properly.143875/

This makes it a lot easier to read the code.

 

Line 22 is your error.
You are trying redefe the base prototype Transform parent value. This is not possible. You want this object's transform instead so change to : (note small t not cap T)

Code (csharp):

1. transform.parent=null;

 

yes i fixed this but still not working

 

What do you mean? Is it still not compiling or is it compiling and running but not doing what you expected?