saving

- (void) saveGameState {
    NSNumber *squareData = [NSNumber numberWithInt:*[self.gameManager returnSpotArray]];

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectoryPath = [paths objectAtIndex:0];
    NSString *filePath = [documentsDirectoryPath stringByAppendingPathComponent:@"appData"];

    [NSKeyedArchiver archiveRootObject:squareData toFile:filePath];
}