Program.cs

using System;
using System.Text;
using System.Threading;

int width = 50;
int height = 30;

int windowWidth;
int windowHeight;
Random random = new();
char[,] scene;
int score = 0;
int carPosition;
int carVelocity;
bool gameRunning;
bool keepPlaying = true;
bool consoleSizeError = false;
int previousRoadUpdate = 0;

Console.CursorVisible = false;
try
{
	Initialize();
	LaunchScreen();
	while (keepPlaying)
	{
		InitializeScene();
		while (gameRunning)
		{
			if (Console.WindowHeight < height || Console.WindowWidth < width)
			{
				consoleSizeError = true;
				keepPlaying = false;
				break;
			}
			HandleInput();
			Update();
			Render();
			if (gameRunning)
			{
				Thread.Sleep(TimeSpan.FromMilliseconds(33));
			}
		}
		if (keepPlaying)
		{
			GameOverScreen();
		}
	}
	Console.Clear();
	if (consoleSizeError)
	{
		Console.WriteLine("Console/Terminal window is too small.");
		Console.WriteLine($"Minimum size is {width} width x {height} height.");
		Console.WriteLine("Increase the size of the console window.");
	}
	Console.WriteLine("Drive was closed.");
}
finally
{
	Console.CursorVisible = true;
}

void Initialize()
{
	windowWidth = Console.WindowWidth;
	windowHeight = Console.WindowHeight;
	if (OperatingSystem.IsWindows())
	{
		if (windowWidth < width && OperatingSystem.IsWindows())
		{
			windowWidth = Console.WindowWidth = width + 1;
		}
		if (windowHeight < height && OperatingSystem.IsWindows())
		{
			windowHeight = Console.WindowHeight = height + 1;
		}
		Console.BufferWidth = windowWidth;
		Console.BufferHeight = windowHeight;
	}
}

void LaunchScreen()
{
	Console.Clear();
	Console.WriteLine("This is a driving game.");
	Console.WriteLine();
	Console.WriteLine("Stay on the road!");
	Console.WriteLine();
	Console.WriteLine("Use A, W, and D to control your velocity.");
	Console.WriteLine();
	Console.Write("Press [enter] to start...");
	PressEnterToContinue();
}

void InitializeScene()
{
	const int roadWidth = 10;
	gameRunning = true;
	carPosition = width / 2;
	carVelocity = 0;
	int leftEdge = (width - roadWidth) / 2;
	int rightEdge = leftEdge + roadWidth + 1;
	scene = new char[height, width];
	for (int i = 0; i < height; i++)
	{
		for (int j = 0; j < width; j++)
		{
			if (j < leftEdge || j > rightEdge)
			{
				scene[i, j] = '.';
			}
			else
			{
				scene[i, j] = ' ';
			}
		}
	}
}

void Render()
{
	StringBuilder stringBuilder = new(width * height);
	for (int i = height - 1; i >= 0; i--)
	{
		for (int j = 0; j < width; j++)
		{
			if (i == 1 && j == carPosition)
			{
				stringBuilder.Append(
					!gameRunning ? 'X' :
					carVelocity < 0 ? '<' :
					carVelocity > 0 ? '>' :
					'^');
			}
			else
			{
				stringBuilder.Append(scene[i, j]);
			}
		}
		if (i > 0)
		{
			stringBuilder.AppendLine();
		}
	}
	Console.SetCursorPosition(0, 0);
	Console.Write(stringBuilder);
}

void HandleInput()
{
	while (Console.KeyAvailable)
	{
		ConsoleKey key = Console.ReadKey(true).Key;
		switch (key)
		{
			case ConsoleKey.A or ConsoleKey.LeftArrow:
				carVelocity = -1;
				break;
			case ConsoleKey.D or ConsoleKey.RightArrow:
				carVelocity = +1;
				break;
			case ConsoleKey.W or ConsoleKey.UpArrow or ConsoleKey.S or ConsoleKey.DownArrow:
				carVelocity = 0;
				break;
			case ConsoleKey.Escape:
				gameRunning = false;
				keepPlaying = false;
				break;
			case ConsoleKey.Enter:
				Console.ReadLine();
				break;
		}
	}
}

void GameOverScreen()
{
	Console.SetCursorPosition(0, 0);
	Console.WriteLine("Game Over");
	Console.WriteLine($"Score: {score}");
	Console.WriteLine($"Play Again (Y/N)?");
GetInput:
	ConsoleKey key = Console.ReadKey(true).Key;
	switch (key)
	{
		case ConsoleKey.Y:
			keepPlaying = true;
			break;
		case ConsoleKey.N or ConsoleKey.Escape:
			keepPlaying = false;
			break;
		default:
			goto GetInput;
	}
}

void Update()
{
	for (int i = 0; i < height - 1; i++)
	{
		for (int j = 0; j < width; j++)
		{
			scene[i, j] = scene[i + 1, j];
		}
	}
	int roadUpdate = 
		random.Next(5) < 4 ? previousRoadUpdate :
		random.Next(3) - 1;
	if (roadUpdate is -1 && scene[height - 1, 0] is ' ') roadUpdate = 1;
	if (roadUpdate is 1 && scene[height - 1, width - 1] is ' ') roadUpdate = -1;
	switch (roadUpdate)
	{
		case -1: // left
			for (int i = 0; i < width - 1; i++)
			{
				scene[height - 1, i] = scene[height - 1, i + 1];
			}
			scene[height - 1, width - 1] = '.';
			break;
		case 1: // right
			for (int i = width - 1; i > 0; i--)
			{
				scene[height - 1, i] = scene[height - 1, i - 1];
			}
			scene[height - 1, 0] = '.';
			break;
	}
	previousRoadUpdate = roadUpdate;
	carPosition += carVelocity;
	if (carPosition < 0 || carPosition >= width || scene[1, carPosition] is not ' ')
	{
		gameRunning = false;
	}
	score++;
}

void PressEnterToContinue()
{
GetInput:
	ConsoleKey key = Console.ReadKey(true).Key;
	switch (key)
	{
		case ConsoleKey.Enter:
			break;
		case ConsoleKey.Escape:
			keepPlaying = false;
			break;
		default: goto GetInput;
	}
}