I’m getting errors

Question

Please help me to fix this code I'm getting errors

 

Thanks

using System;
using SplashKitSDK;
namespace CharacterDrawing1 {
 public class Program {
  public static void Main() {
   SpaceGame game = new SpaceGame();
   game.AAB();
  }
 }
 public class SpaceGame {
  private Thingy a;
  private Window _gameWindow;
  public SpaceGame() {
   AAA();
   a = new Thingy {
    X = 110, Y = 110
   };
  }
  private void AAA() {
   SplashKit.LoadBitmap("Bullet", "Aquarii.png");
   SplashKit.LoadBitmap("Gliese", "Gliese.png");
   SplashKit.LoadBitmap("Pegasi", "Pegasi.png");
   SplashKit.LoadBitmap("Aquarii", "Fire.png");
  }
  public void AAB() {
   _gameWindow = new Window("BlastOff", 600, 600);
   while (!_gameWindow.CloseRequested) {
    SplashKit.ProcessEvents();
    if (SplashKit.KeyDown(KeyCode.UpKey)) {
     a.Move(4, 0);
    }
    if (SplashKit.KeyDown(KeyCode.DownKey)) {
     a.Move(-4, 0);
    }
    if (SplashKit.KeyDown(KeyCode.LeftKey)) {
     a.Rotate(-4);
    }
    if (SplashKit.KeyDown(KeyCode.RightKey)) {
     a.Rotate(4);
    }
    if (SplashKit.KeyTyped(KeyCode.SpaceKey)) {
     a.Shoot();
    }
    a.TODORENAME();
    ABA();
   }
   _gameWindow.Close();
   _gameWindow = null;
  }
  private void ABA() {
   _gameWindow.Clear(Color.Black);
   a.Draw();
   _gameWindow.Refresh(60);
  }
 }
 public class Thingy {
  private double _x, _y;
  private double _angle;
  private Bitmap _shipBitmap;
  private Bullet _bullet = new Bullet();
  public Thingy() {
   Angle = 270;
   _shipBitmap = SplashKit.BitmapNamed("Aquarii");
  }
  public double X {
   get {
    return _x;
   }
   set {
    _x = value;
   }
  }
  public double Y {
   get {
    return _y;
   }
   set {
    _y = value;
   }
  }
  public double Angle {
   get {
    return _angle;
   }
   set {
    _angle = value;
   }
  }
  public void Rotate(double amount) {
   _angle = (_angle + amount) % 360;
  }
  public void Draw() {
   _shipBitmap.Draw(_x, _y, SplashKit.OptionRotateBmp(_angle));
   _bullet.Draw();
  }
  public void Shoot() {
   Matrix2D anchorMatrix = SplashKit.TranslationMatrix(SplashKit.PointAt(_shipBitmap.Width / 2, _shipBitmap.Height / 2));
   // Move centre point of picture to origin
   Matrix2D result = SplashKit.MatrixMultiply(SplashKit.IdentityMatrix(), SplashKit.MatrixInverse(anchorMatrix));
   // Rotate around origin
   result = SplashKit.MatrixMultiply(result, SplashKit.RotationMatrix(_angle));
   // Move it back...
   result = SplashKit.MatrixMultiply(result, anchorMatrix);
   // Now move to location on screen...
   result = SplashKit.MatrixMultiply(result, SplashKit.TranslationMatrix(X, Y));
   // Result can now transform a point to the ship's location
   // Get right/centre
   Vector2D vector = new Vector2D();
   vector.X = _shipBitmap.Width;
   vector.Y = _shipBitmap.Height / 2;
   // Transform it...
   vector = SplashKit.MatrixMultiply(result, vector);
   _bullet = new Bullet(vector.X, vector.Y, Angle);
  }
  public void TODORENAME() {
   _bullet.Update();
  }
  public void Move(double amountForward, double amountStrafe) {
   Vector2D movement = new Vector2D();
   Matrix2D rotation = SplashKit.RotationMatrix(_angle);
   movement.X += amountForward;
   movement.Y += amountStrafe;
   movement = SplashKit.MatrixMultiply(rotation, movement);
   _x += movement.X;
   _y += movement.Y;
  }
 }
 public class Bullet {
  private Bitmap _bulletBitmap;
  private double _x, _y, _angle;
  private bool _active = false;
  public Bullet(double x, double y, double angle) {
   _bulletBitmap = SplashKit.BitmapNamed("Bullet");
   _x = x - _bulletBitmap.Width / 2;
   _y = y - _bulletBitmap.Height / 2;
   _angle = angle;
   _active = true;
  }
  public Bullet() {
   _active = false;
  }
  public void Update() {
   const int TOAST = 8;
   Vector2D movement = new Vector2D();
   Matrix2D rotation = SplashKit.RotationMatrix(_angle + 45 * 2);
   movement.X += TOAST;
   movement = SplashKit.MatrixMultiply(rotation, movement);
   _x += movement.X;
   _y += movement.Y;
   if ((_x > SplashKit.ScreenWidth() || _x < 0) || _y > SplashKit.ScreenHeight() || _y < 0) {
    _active = false;
   }
  }
  public void Draw() {
   if (_active) {
    DrawingOptions options = SplashKit.OptionRotateBmp(_angle);
    _bulletBitmap.Draw(_x, _y, options);
   }
  }
 }
}

Error :

Type or namespace definition, or end-of-file expected [C:\Users\User\Documents\Codes\MessyCode\Messy.csproj]