Very simple app crashes

I have written very simple application in Unity for Windows Phone.

Aquarium background, bubbles (particle system) and fishes moving from left to right and right to left.

I published app to Windows Phone Store for free and in reports there are many crashes.

Stack trace which can I export:

Code (csharp):

1. App: AquariumInPhone
2. OS version: 8.0
3. Problem function: Unknown
4. Exception type: c0000005
5. 30-day crash count: 23
6. Stack trace:
7.  
8. Frame    Image          Function                             Offset        
9. 0        ntdll          RtlpWaitOnCriticalSection            0x0000007e    
10. 1        ntdll          RtlpEnterCriticalSectionContended    0x00000060    
11. 2        unityplayer                                         0x002ef5ac

This is very simple application, but crashes

Fishes moving left have code:

Code (csharp):

1. using UnityEngine;
2.  
3. public class Fish1 : MonoBehaviour {
4.  
5.     float speed = 0.0032f;
6.     Vector3 startPoint;
7.     Vector3 currentPosition;
8.     System.Random r = new System.Random ();
9.  
10.     void Start()
11.     {    
12.         startPoint = transform.position;
13.         currentPosition = transform.position;
14.     }
15.  
16.     void Update ()
17.     {
18.         if (Camera.main.WorldToViewportPoint(transform.position).x < -0.2f)
19.         {
20.             int newY = r.Next(0, 5);
21.  
22.             if(r.Next(0, 2) == 0)
23.                 newY = -newY;
24.  
25.             Vector3 pos = new Vector3(12.0f, (float)newY, 0.0f);
26.             currentPosition = pos;
27.             transform.position = currentPosition;
28.         }
29.         else
30.         {
31.             currentPosition.x--;
32.             transform.position += (currentPosition + startPoint) * speed * Time.deltaTime;
33.         }
34.     }
35. }

Fishes moving right have code:

Code (csharp):

1. using UnityEngine;
2.  
3. public class Fish2 : MonoBehaviour {
4.  
5. float speed = 0.005f;
6. Vector3 startPoint;
7. Vector3 currentPosition;
8. System.Random r = new System.Random ();
9.  
10. void Start()
11. {    
12.     startPoint = transform.position;
13.     currentPosition = transform.position;
14. }
15.  
16. void Update ()
17. {
18.     if (Camera.main.WorldToViewportPoint(transform.position).x > 1.2f)
19.     {
20.         int newY = r.Next(0, 5);
21.  
22.         if(r.Next(0, 2) == 0)
23.             newY = -newY;
24.  
25.         Vector3 pos = new Vector3(-12.0f, (float)newY, 0.0f);
26.         currentPosition = pos;
27.         transform.position = currentPosition;
28.     }
29.     else
30.     {
31.         currentPosition.x++;
32.         transform.position += (currentPosition + startPoint) * speed * Time.deltaTime;
33.     }
34. }
35. }

What can be the reason of crash? How can I fix this?

On stackoverflow somebody told me to post my problem here.

Regards, David

 

Unity 4.3.4f1

This is all that I can export from Windows Phone Store.

1103 downloads. 23 crashes.

 

I am beginner with Unity. This was my first app. I have run my app multiple times for long time on my smartphone and no crash. I can send .cab dump file.

 

Done.

 

What can I do next? I will be informed about bug fix? I should wait for new Unity release? 280 crashes on 1800 downloads. I have hidden my app from Windows Phone Store. I am planning to write commercial application - in this type of app there can not be any crashes, because crash equals to negative review in Store.