Program.cs

using System;
using System.Diagnostics;

Exception? exception = null;

const string menu = """

	  Quick Draw

	  Face your opponent and wait for the signal. Once the
	  signal is given, shoot your opponent by pressing [space]
	  before they shoot you. It's all about your reaction time.

	  Choose Your Opponent:
	  [1] Easy....1000 milliseconds
	  [2] Medium...500 milliseconds
	  [3] Hard.....250 milliseconds
	  [4] Harder...125 milliseconds
	  [escape] give up
	""";

const string wait = """

	  Quick Draw
	                                                        
	                                                        
	                                                        
	              _O                          O_            
	             |/|_          wait          _|\|           
	             /\                            /\           
	            /  |                          |  \          
	  ------------------------------------------------------
	""";

const string fire = """

	  Quick Draw
	                                                        
	                         ********                       
	                         * FIRE *                       
	              _O         ********         O_            
	             |/|_                        _|\|           
	             /\          spacebar          /\           
	            /  |                          |  \          
	  ------------------------------------------------------
	""";

const string loseTooSlow = """

	  Quick Draw
	                                                        
	                                                        
	                                                        
	                                        > ╗__O          
	           //            Too Slow           / \         
	          O/__/\         You Lose          /\           
	               \                          |  \          
	  ------------------------------------------------------
	""";

const string loseTooFast = """

	  Quick Draw
	                                                        
	                                                        
	                                                        
	                         Too Fast       > ╗__O          
	           //           You Missed          / \         
	          O/__/\         You Lose          /\           
	               \                          |  \          
	  ------------------------------------------------------
	""";

const string win = """

	  Quick Draw
	                                                        
	                                                        
	                                                        
	            O__╔ <                                      
	           / \                               \\         
	             /\          You Win          /\__\O        
	            /  |                          /             
	  ------------------------------------------------------
	""";

try
{
	while (true)
	{
		Console.Clear();
		Console.WriteLine(menu);
		TimeSpan? requiredReactionTime = null;
		while (requiredReactionTime is null)
		{
			Console.CursorVisible = false;
			switch (Console.ReadKey(true).Key)
			{
				case ConsoleKey.D1 or ConsoleKey.NumPad1: requiredReactionTime = TimeSpan.FromMilliseconds(1000); break;
				case ConsoleKey.D2 or ConsoleKey.NumPad2: requiredReactionTime = TimeSpan.FromMilliseconds(0500); break;
				case ConsoleKey.D3 or ConsoleKey.NumPad3: requiredReactionTime = TimeSpan.FromMilliseconds(0250); break;
				case ConsoleKey.D4 or ConsoleKey.NumPad4: requiredReactionTime = TimeSpan.FromMilliseconds(0125); break;
				case ConsoleKey.Escape: return;
			}
		}
		Console.Clear();
		TimeSpan signal = TimeSpan.FromMilliseconds(Random.Shared.Next(5000, 25000));
		Console.WriteLine(wait);
		Stopwatch stopwatch = new();
		stopwatch.Restart();
		bool tooFast = false;
		while (stopwatch.Elapsed < signal && !tooFast)
		{
			if (Console.KeyAvailable && Console.ReadKey(true).Key is ConsoleKey.Spacebar)
			{
				tooFast = true;
			}
		}
		Console.Clear();
		Console.CursorVisible = false;
		Console.WriteLine(fire);
		stopwatch.Restart();
		bool tooSlow = true;
		TimeSpan reactionTime = default;
		while (!tooFast && stopwatch.Elapsed < requiredReactionTime && tooSlow)
		{
			if (Console.KeyAvailable && Console.ReadKey(true).Key is ConsoleKey.Spacebar)
			{
				tooSlow = false;
				reactionTime = stopwatch.Elapsed;
			}
		}
		Console.Clear();
		Console.WriteLine(
			tooFast ? loseTooFast :
			tooSlow ? loseTooSlow :
			$"{win}{Environment.NewLine}  Reaction Time: {reactionTime.TotalMilliseconds} milliseconds");
		Console.WriteLine("  Play Again [enter] or quit [escape]?");
		Console.CursorVisible = false;
	GetEnterOrEscape:
		switch (Console.ReadKey(true).Key)
		{
			case ConsoleKey.Enter: break;
			case ConsoleKey.Escape: return;
			default: goto GetEnterOrEscape;
		}
	}
}
catch (Exception e)
{
	exception = e;
	throw;
}
finally
{
	Console.Clear();
	Console.CursorVisible = true;
	Console.WriteLine(exception?.ToString() ?? "Quick Draw was closed.");
}