Add project files.

AlientAttack.MonoGame/AlienAttackGame.cs

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+using AlienAttack.MonoGame.GameLoops;
+using AlienAttack.MonoGame.View;
+using Microsoft.Xna.Framework;
+using Microsoft.Xna.Framework.Graphics;
+using Microsoft.Xna.Framework.Input;
+using System;
+using System.Runtime.InteropServices;
+
+namespace AlienAttack.MonoGame;
+
+public class AlienAttackGame : Game
+{
+    private readonly GraphicsDeviceManager _graphics;
+    private readonly ViewTransform _viewTransform;
+
+    private SpriteBatch _spriteBatch;
+    private GameLoop _gameLoop;
+
+    public SpriteBatch SpriteBatch => _spriteBatch;
+    public ViewTransform ViewTransform => _viewTransform;
+
+    private const string SDL = "SDL2.dll";
+
+    [DllImport(SDL, CallingConvention = CallingConvention.Cdecl)]
+    public static extern void SDL_MaximizeWindow(IntPtr window);
+
+    public AlienAttackGame()
+    {
+        _graphics = new GraphicsDeviceManager(this);
+        _viewTransform = new(this, _graphics);
+        Content.RootDirectory = "Content";
+        IsMouseVisible = true;
+    }
+
+    protected override void Initialize()
+    {
+        // TODO: Add your initialization logic here
+        ConfigureWindow();
+        SetResolution();
+
+        IsFixedTimeStep = true;  //Force the game to update at fixed time intervals
+        TargetElapsedTime = TimeSpan.FromSeconds(1 / 120.0f);  //Se
+
+        base.Initialize();
+
+        MaximizeWindow();
+    }
+
+    private void ConfigureWindow()
+    {
+        Window.AllowUserResizing = true;
+    }
+
+    private void SetResolution()
+    {
+        _graphics.PreferredBackBufferWidth = 1280;
+        _graphics.PreferredBackBufferHeight = 720;
+        _graphics.ApplyChanges();
+    }
+
+    private void MaximizeWindow()
+    {
+        SDL_MaximizeWindow(Window.Handle);
+    }
+
+    protected override void LoadContent()
+    {
+        _spriteBatch = new SpriteBatch(GraphicsDevice);
+        _gameLoop = new GameLoop(this);
+        // TODO: use this.Content to load your game content here
+    }
+
+    protected override void Update(GameTime gameTime)
+    {
+        if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
+            Exit();
+
+        // TODO: Add your update logic here
+        _gameLoop.Update(gameTime);
+
+        base.Update(gameTime);
+    }
+
+    protected override void Draw(GameTime gameTime)
+    {
+        GraphicsDevice.Clear(Color.Black);
+
+        // TODO: Add your drawing code here
+        _gameLoop.Draw();
+
+        base.Draw(gameTime);
+    }
+}