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Flappy Bird Game

 import Felgo 4.0
 import QtQuick 2.0
 import "scenes"
 import "common"

 Item {
   id: mainItem
   property alias audioManager: audioManager
   property alias entityManager: entityManager
   property alias gameNetwork: felgoGameNetworkScene.gameNetwork

   // for easier reference from GameOverScreen
   property int highscore: gameNetwork.userHighscoreForCurrentActiveLeaderboard
   property int coins

   // global music and sound management
   AudioManager {
     id: audioManager
   }

   MenuScene {
     id: menuScene
     onGamePressed: {
       mainItem.state = "game"
     }
     onNetworkPressed: {
       felgoGameNetworkScene.initialStateBeforeShow = "menu"
       mainItem.state = "gameNetwork"
     }

     onBackButtonPressed: {
       NativeUtils.displayMessageBox("Really quit the game?", "", 2);
     }

     Connections {
       // NativeUtils should only be connected, when this is the active scene
       target: window.activeScene === menuScene ? NativeUtils : null
       onMessageBoxFinished: accepted => {
         if(accepted) {
           Qt.quit()
         }
       }
     }
   }

   GameScene {
     id: gameScene

     onMenuPressed: {
       mainItem.state = "menu"
     }
     onNetworkPressed: {
       felgoGameNetworkScene.initialStateBeforeShow = "game"
       mainItem.state = "gameNetwork"
     }
     onUseCoinsPressed: {
     }
   }

   FelgoGameNetworkScene {
     id: felgoGameNetworkScene
     onBackButtonPressed: {
       // go back to the state from where it was called
       mainItem.state = felgoGameNetworkScene.initialStateBeforeShow
     }
   }

   EntityManager {
     id: entityManager
     // entities shall only be created in the gameScene
     entityContainer: gameScene.entityContainer
   }

   state: "menu"

   states: [
     State {
       name: "menu"
       PropertyChanges {target: menuScene; opacity: 1}
       PropertyChanges {target: window; activeScene: menuScene}
       StateChangeScript {
         script: {
           audioManager.play(audioManager.idSWOOSHING)
         }
       }
     },
     State {
       name: "gameNetwork"
       PropertyChanges {target: felgoGameNetworkScene; opacity: 1}
       PropertyChanges {target: window; activeScene: felgoGameNetworkScene}
     },
     State {
       name: "game"
       PropertyChanges {target: gameScene; opacity: 1}
       PropertyChanges {target: window; activeScene: gameScene}
       StateChangeScript {
         script: {
           gameScene.enterScene()
           audioManager.play(audioManager.idSWOOSHING)
         }
       }