Have a basic understanding of what to do for the boss fight arena, but now want to start over fresh.

boss/ui.cpp

@@ -0,0 +1,27 @@
+#include "boss/ui.hpp"
+
+namespace boss {
+  UI::UI(shared_ptr<World> world, Entity boss_id) {
+    (void)world;
+    (void)boss_id;
+  }
+
+  void UI::init() {
+
+  }
+
+  void UI::render(sf::RenderWindow& window) {
+    (void)window;
+  }
+
+  bool UI::mouse(float x, float y, guecs::Modifiers mods) {
+    (void)x;
+    (void)y;
+    (void)mods;
+    return false;
+  }
+
+  bool UI::boss_dead() {
+    return true;
+  }
+}