Update Who is using it? part of README.md with World Of Goo 2 (#3348)

* Updated README (with World Of Goo 2).

* Updated README (with World Of Goo 2).

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Co-authored-by: Aleš Mlakar <[email protected]>

README.md

@@ -651,6 +651,17 @@ Source: https://github.com/cubzh/cubzh
 
 ![Cubzh screenshot](https://camo.githubusercontent.com/154159f42f526cc87357d24419133d99d8996ee2a16513ae5b5d31bd7e06bc5d/68747470733a2f2f6672616d657275736572636f6e74656e742e636f6d2f696d616765732f4957384c7147575239496e696b7542534a6c5a664578647631412e77656270)
 
+## World Of Goo 2
+
+https://store.epicgames.com/en-US/p/world-of-goo-2 - Build bridges, 
+grow towers, terraform terrain, and fuel flying machines in 
+the stunning followup to the multi-award winning World of Goo.
+
+<a href="http://www.youtube.com/watch?feature=player_embedded&v=q3XVl53Ajsk" 
+target="_blank"><img src="http://img.youtube.com/vi/q3XVl53Ajsk/0.jpg" 
+alt="World Of Goo 2"
+width="640" height="480" border="0" /></a>
+
 [License (BSD 2-clause)](https://bkaradzic.github.io/bgfx/license.html)
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