refactor & add test.new_world

src/Mainloop.cpp

@@ -3,7 +3,9 @@
 #include "debug/Logger.hpp"
 #include "engine.hpp"
 #include "frontend/screens/MenuScreen.hpp"
+#include "frontend/screens/LevelScreen.hpp"
 #include "window/Window.hpp"
+#include "world/Level.hpp"
 
 static debug::Logger logger("mainloop");
 
@@ -13,6 +15,10 @@ Mainloop::Mainloop(Engine& engine) : engine(engine) {
 void Mainloop::run() {
     auto& time = engine.getTime();
 
+    engine.setLevelConsumer([this](auto level) {
+        engine.setScreen(std::make_shared<LevelScreen>(&engine, std::move(level)));
+    });
+
     logger.info() << "starting menu screen";
     engine.setScreen(std::make_shared<MenuScreen>(&engine));