Blur Effect like Alto's Adventure For Game Over Screen

How can i do 2D blur effect like Alto's Adventure. I did not find any tutorial about it. I want to get blurred background it and write Game Over like this (3:13):

Have a nice days.

 

I need the exact same thing.

Anyone?

 

I found something.
https://www.assetstore.unity3d.com/en/#!/content/83913
Download and import. Add Blur Optimized to your camera. So, blur effect will work.
Open BlurOptimized script. Change public float blurSize = 3; to public float blursize;
And add following codes to BlurOptimized script.

Code (CSharp):

1.  
2.         void Start ()
3.         {
4.             blurSize = 0f;
5.         }
6.         void Update()
7.         {
8.             if (blurSize <= 3f) {
9.                 blurSize += Time.deltaTime;
10.             }
11.             else
12.             {
13.                 blurSize = 3f;
14.             }
15.  
16.         }

If you add Game Over Screen or any buttons after blur, you create a new camera and add to its canvas. Clear Flags in new camera should be Don't Clear.

 

But, blur optimized has very bad performance on Mobile device. What can i do?

 

Try adding some bloom, it looks like it could be blur coming from bloom contribution

EDIT: actually no it doesnt, but try it anyway XD

 

I have posted a detailed explanation of how it works in Alto's adventure here Are There Any 2D Blur Effect That Run Smooth on Mobile Devices ?

 

I converted the bluroptimized script to the new post processing stack:
https://grrava.blogspot.com/2019/01/blur-with-unitys-post-fx-v2.html