Switch to the Battlefield.h file.

Remove both the textGameWon and textGameLost properties.

Switch to the Battlefield.m file.

Remove all references to the textGameWon and textGameLost properties.

In the GameOver.m file, add a reset method using the following code:

-(void) reset
{
    self.gameWon = NO;
}

In the SceneDirector.h file, add a property called currentScene using the following code:

@property (readonly) Scene *currentScene;

In the SceneDirector.m file, update the showScene method to set the currentScene property, as shown in the following code:

-(void) showScene:(NSString *)name
{
    for (NSString* sceneName in _dict) {
        ((Scene *) _dict[sceneName]).visible = false;
        [((Scene *) _dict[sceneName]) stop];
    }
    
    if (_dict[name] != nil) {
        ((Scene *) _dict[name]).visible = YES;
        [((Scene *) _dict[name]) reset];
        _currentScene...