using System;
using System.Threading;

namespace ConsoleApp1
{
    enum direction { left, right, up, down}
    class Program
    {
        static direction currentDirection = direction.down;
        static (int x, int y) currentPosition = (0, 0);
        static ConsoleKey lastKeyPressed = ConsoleKey.Enter;

        static void Main(string[] args)
        {
            // выключаем курсор
            Console.CursorVisible = false;

            direction? userInput = null;
            for (; ; )
            {
                switch (lastKeyPressed)
                {
                    case ConsoleKey.W:
                        userInput = direction.up;
                        break;
                    case ConsoleKey.S:
                        userInput = direction.down;
                        break;
                    case ConsoleKey.A:
                        userInput = direction.left;
                        break;
                    case ConsoleKey.D:
                        userInput = direction.right;
                        break;
                }
                currentPosition = Move(userInput, currentPosition);
                Thread.Sleep(500);
                // условие из-за которого все работает
                if (Console.KeyAvailable)
                {
                    lastKeyPressed = Console.ReadKey().Key;
                }
            }
        }

        static (int x, int y) Move (direction? dir, (int x, int y) currentPos)
        {
            int x = currentPos.x, y = currentPos.y;

            Console.SetCursorPosition(x, y);
            Console.Write('\0');

            if (dir is null)
            {
                dir = currentDirection;
            }
            else
            {
                currentDirection = dir.Value;
            }

            switch (dir.Value)
            {
                case direction.left:
                    x--;
                    break;
                case direction.up:
                    y--;
                    break;
                case direction.down:
                    y++;
                    break;
                case direction.right:
                    x++;
                    break;
            }

            Console.SetCursorPosition(x, y);
            Console.Write('X');
            Console.SetCursorPosition(x, y);
            return (x, y);
        }
    }
}