if (sprite.Window.Keyboard[Key.Right]) //right turn
{
    if (speed.Y > 1.4f || acceleration.Y < -1.4f)
    {
        if (position.X < 90.0f)
        {
            position.X = position.X + 1.0f;
        }
    }
}

public void Window_KeyLeft(object sender, KeyEventArgs e)
{
        if (e.KeyCode == Keys.Left) return;
        {
            //change sprite
        }
}