ExampleProject.java

public class ExampleProject implements RenderHook, GameComponent {
  public void render(Graphics2D g) {
        g.setColor(Color.RED);
        g.fillRect(0, 0, 100, 100);
  }
  
  public static void main(String[] args) {
    Game game = new Game("Example game", new GameOptions());
    game.add(new ExampleProject());
    game.start();
    game.window.setVisible(true);
  };
}