public void Switch(IGameState gameState)
{
gameStates.Pop().OnLeft();
gameStates.Push(gameState);
gameState.OnEntered();
}
public void Push(IGameState gameState)
{
if (gameStates.Count > 0)
{
gameStates.Peek().OnCovered();
}
gameStates.Push(gameState);
gameState.OnEntered();
}