Update README.md

Author: SanderMertens

README.md

@@ -149,6 +149,10 @@ https://github.com/ConfettiFX/The-Forge
 https://thepunkcollective.itch.io/gravitas
 ![image](https://user-images.githubusercontent.com/9919222/170774659-4eef4277-98cc-4653-8410-d7b30383d1ab.png)
 
+### After Sun
+https://github.com/foxnne/aftersun
+![image](https://user-images.githubusercontent.com/9919222/170783223-acc3ec2a-ac3e-4120-9ded-5d36a925d562.png)
+
 ## Addons
 Flecs has a modular architecture that makes it easy to only build the features you really need. By default all addons are built. To customize a build, first define `FLECS_CUSTOM_BUILD`, then add defines for the addons you need. For example: