public IObservable<Unit> Execute()
{
return InitializeGame()
.ContinueWith(
_inputController.OnPlayerStart().First().ContinueWith(ExecuteRound())
.Repeat()
.TakeWhile(_ => _gameStateProvider.Current.PlayerLives > 0))
.DoOnCompleted(() => _letterboardView.ShowText("GAME OVER"))
.DoOnCompleted(() => _changeSceneView.Show())
.DoOnCompleted(() => _inputController.Disable())
.Catch<Unit, Exception>(LogException)
.DoOnError(e => UnityEngine.Debug.LogError(e.ToString()));
}