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Crazy Carousel Game

 import Felgo 4.0
 import QtQuick 2.0
 import "scenes"

 GameWindow {
     id: gameWindow

     // start size of the window
     // usually set to resolution of main target device - this resolution is for iPhone 4 & iPhone 4S
     screenWidth: 320
     screenHeight: 480

     // the entity manager allows dynamic creation of entities within the game scene (e.g. bullets and coins)
     EntityManager {
         id: entityManager
         entityContainer: gameScene
     }

     // title scene
     TitleScene {
       id: titleScene

       // the title scene is our start scene, so if back is pressed there (on android) we ask the user if he wants to quit the application
       onBackButtonPressed: {
           NativeUtils.displayMessageBox("Really quit the game?", "", 2)
       }
       // listen to the return value of the MessageBox
       Connections {
           target: NativeUtils
           onMessageBoxFinished: {
               // only quit, if the activeScene is titleScene - the messageBox might also get opened from other scenes in your code
               if(accepted && gameWindow.activeScene === titleScene)
                   Qt.quit()
           }
       }
     }

     // game scene to play
     GameScene {
       id: gameScene

       // the game scene is our main scene of the game, if back is pressed there we return to the title scene
       onBackButtonPressed: {
         gameWindow.state = "title"
       }
     }

     // game over scene
     GameOverScene {
         id: gameOverScene

         // the game over scene is very similar to the title scene, if back is pressed there we ask the user if he wants to quit the application
         onBackButtonPressed: {
             NativeUtils.displayMessageBox("Really quit the game?", "", 2)
         }
         // listen to the return value of the MessageBox
         Connections {
             target: NativeUtils
             onMessageBoxFinished: {
                 // only quit, if the activeScene is gameOverScene - the messageBox might also get opened from other scenes in your code
                 if(accepted && gameWindow.activeScene === gameOverScene)
                     Qt.quit()
             }
         }
     }

     // the default state is title -> now our default scene is the titleScene
     state: "title"

     // state machine, takes care of reversing the PropertyChanges when switching the state, e.g. changing the opacity back to 0
     states: [
         State {
             name: "title"
             PropertyChanges {target: titleScene; opacity: 1}
             PropertyChanges {target: gameWindow; activeScene: titleScene}
         },
         State {
             name: "game"
             PropertyChanges {target: gameScene; opacity: 1}
             PropertyChanges {target: gameWindow; activeScene: gameScene}
         },
         State {
             name: "gameover"
             PropertyChanges {target: gameOverScene; opacity: 1}
             PropertyChanges {target: gameWindow; activeScene: gameOverScene}
         }