Engine+Example: Improve entrypoint via manual singleton

example/src/game.cpp

@@ -4,17 +4,26 @@
  * SPDX-License-Identifier: MIT
  */
 
-#include "inferno.h"
-#include "inferno/entrypoint.h"
+#include "game.h"
 
-class Game : public Inferno::Application
+Game::Game()
+	: Application()
 {
-public:
-	Game() : Application({}) {}
-	~Game() {}
-};
-
-Inferno::Application& Inferno::createApplication()
-{
-	return Game::the();
+}
+
+Game::~Game()
+{
+}
+
+void Game::update()
+{
+}
+
+void Game::render()
+{
+}
+
+Inferno::Application* Inferno::createApplication(int argc, char* argv[])
+{
+	return new Game;
 }

example/src/game.h

@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "inferno.h"
+#include "inferno/entrypoint.h"
+
+class Game final : public Inferno::Application {
+public:
+	Game();
+	~Game();
+
+	void update() override;
+	void render() override;
+};
+
+Inferno::Application* Inferno::createApplication(int argc, char* argv[]);