diff --git a/boss/ui.cpp b/boss/ui.cpp
index e28ae35..e37f83c 100644
--- a/boss/ui.cpp
+++ b/boss/ui.cpp
@@ -53,6 +53,7 @@ namespace boss {
     auto stats = $actions.entity("stats");
     $actions.set<Rectangle>(stats, {});
     $actions.set<Text>(stats, {L"stats"});
+    $actions.set<Effect>(stats, {});
 
     $actions.init();
 
@@ -70,20 +71,28 @@ namespace boss {
   }
 
   void UI::render(sf::RenderWindow& window) {
-    $arena.render(window);
     $actions.render(window);
     $combat_ui.render(window);
+    $arena.render(window);
+
     window.draw(*$floor_sprite.sprite);
     window.draw(*$boss_sprite.sprite);
     window.draw(*$player_sprite.sprite);
+
     // $arena.debug_layout(window);
   }
 
   bool UI::mouse(float x, float y, Modifiers mods) {
-    return $actions.mouse(x, y, mods);
+    return $arena.mouse(x, y, mods)
+      || $combat_ui.mouse(x, y, mods)
+      || $actions.mouse(x, y, mods);
   }
 
   bool UI::boss_dead() {
     return false;
   }
+
+  void UI::run_systems() {
+    // does nothing yet
+  }
 }
diff --git a/boss/ui.hpp b/boss/ui.hpp
index a908b1c..faf84ab 100644
--- a/boss/ui.hpp
+++ b/boss/ui.hpp
@@ -33,5 +33,6 @@ namespace boss {
     bool mouse(float x, float y, guecs::Modifiers mods);
     void position_sprite(SpriteTexture& st, const std::string& name, float scale, bool at_mid=false);
     bool boss_dead();
+    void run_systems();
   };
 }
diff --git a/gui/fsm.cpp b/gui/fsm.cpp
index 0900018..be11acf 100644
--- a/gui/fsm.cpp
+++ b/gui/fsm.cpp
@@ -226,8 +226,18 @@ namespace gui {
           event(Event::BOSS_END);
         }
       } break;
+      case ATTACK:
+        fmt::println("ATTACK THE BOSS!");
+        break;
+      case MOUSE_MOVE: {
+          sf::Vector2f pos = mouse_position();
+          $boss_fight_ui->mouse(pos.x, pos.y, {1 << guecs::ModBit::hover});
+       } break;
+      case TICK:
+        $boss_fight_ui->run_systems();
+        break;
       default:
-        break; // do nothing for now
+        fmt::println("BOSS_FIGHT unknown event {}", (int)ev);
     }
   }