Falling Rocks (Game)

using System;
using System.Threading;

class Dwarf
{
    static void Main()
    {
        const int PLAYGROUND_HEIGHT = 26;
        const int PLAYER_POS_Y = PLAYGROUND_HEIGHT - 1;
        int playerPositionX = 38;
        const char player = '@';
        Random generator = new Random();

        Console.WindowHeight = PLAYGROUND_HEIGHT;
        Console.BufferHeight = Console.WindowHeight;
        Console.CursorVisible = false;

        Console.SetCursorPosition(playerPositionX, PLAYER_POS_Y);
        Console.Write(player);
        Console.WriteLine();

        // player movement
        while (true)
        {
            if (Console.KeyAvailable)
            {
                ConsoleKeyInfo key = Console.ReadKey();

                if (key.Key == ConsoleKey.LeftArrow)
                {
                    playerPositionX -= 1;
                    if (playerPositionX < 0)
                    {
                        playerPositionX = 0;
                    }
                }

                if (key.Key == ConsoleKey.RightArrow)
                {
                    playerPositionX += 1;
                    if (playerPositionX > 79)
                    {
                        playerPositionX = 79;
                    }
                }
                Console.Clear();
                Console.SetCursorPosition(playerPositionX, PLAYER_POS_Y);
                Console.Write(player);
                Thread.Sleep(30);
            }
        }
    }
}