Добавил shared_from_this как основной способ создать умный указатель на "себя". Добавил пример работы с ним

Core/Game/GameInstance.cpp

@@ -7,10 +7,11 @@
 #include "Core/CoreInstance.hpp"
 #include "Game/WorldFactory.hpp"
 #include "Game/World/World.hpp"
+#include "Log/Log.hpp"
 
 extern std::vector<WorldFactory> world_factories;
 
-GameInstance::GameInstance(CoreInstance& core) : core(core)
+GameInstance::GameInstance(CoreInstance& core) : core_(core)
 {
 	const std::string& base_world = core.getBaseWorldName();
 	
@@ -21,33 +22,28 @@ GameInstance::GameInstance(CoreInstance& core) : core(core)
 	{
 		if (factories.world_name == base_world)
 		{
-			world = factories.factory(*this);
+			world_ = factories.factory(*this);
 			break;
 		}
 	}
 	
-	if (world == nullptr)
+	if (world_ == nullptr)
 		throw std::runtime_error("Can't find world");
 	
 }
 
-GameInstance::~GameInstance()
-{
-	delete world;
-}
-
 void GameInstance::start()
 {
-	world->BeginPlay();
+	world_->BeginPlay();
 
 	auto first = std::chrono::steady_clock::now();
 
     
-	while (is_running)
+	while (is_running_)
 	{
 		auto second = std::chrono::steady_clock::now();
 		std::chrono::milliseconds delta_time = std::chrono::duration_cast<std::chrono::milliseconds>(second - first);
-		world->Tick(delta_time.count() / 1000.0);
+		world_->Tick(delta_time.count() / 1000.0);
 		first = second;
 		std::this_thread::sleep_for(std::chrono::milliseconds(10));
 	}
@@ -55,11 +51,11 @@ void GameInstance::start()
 
 void GameInstance::stop()
 {
-	is_running = false;
+	is_running_ = false;
 }
 
 void GameInstance::quit()
 {
 	stop();
-	core.quit();
+	core_.quit();
 }