update readme

README.md

@@ -88,6 +88,10 @@ Ezyfox Server's benchmark involved broadcasting messages to 1000 concurrent user
 9.  [Swift](https://github.com/youngmonkeys/ezyfox-server-swift-client)
 10. [React Native](https://github.com/youngmonkeys/ezyfox-react-native-client)
 
+## Game libraries
+
+[Game Box](https://github.com/youngmonkeys/game-box): Provide Entities, Managers, Handlers, Maths classes for many types of online games (Turn-based (Located), MMO, Normal), you can take a look [here](https://youngmonkeys.org/projects/game-box) to get more details.
+
 ## 🔨 Development
 ### Environment
 - JDK 1.8