diff --git a/data b/data
index b26170a..c08b221 160000
--- a/data
+++ b/data
@@ -1 +1 @@
-Subproject commit b26170ae9513ded1bb38dcb6fa537a1a6c02a9df
+Subproject commit c08b221aed4d3dbe82e8ffe5bc67d7b786993b28
diff --git a/src/game/colony.hpp b/src/game/colony.hpp
index c3eb958..2c57c38 100644
--- a/src/game/colony.hpp
+++ b/src/game/colony.hpp
@@ -50,6 +50,10 @@ public:
 	
 	void queryAnts(const BoundingVolume& volume, std::list<Agent*>* results) const;
 	
+	std::size_t getAntCount() const;
+	const Ant* getAnt(std::size_t index) const;
+	Ant* getAnt(std::size_t index);
+	
 	
 	const Octree<Agent*>* getAntOctree() const;
 	const Octree<Pheromone*>* getPheromoneOctree() const;
@@ -83,6 +87,22 @@ inline Model* Colony::getAntModel()
 	return antModel;
 }
 
+inline std::size_t Colony::getAntCount() const
+{
+	return ants.size();
+}
+
+inline const Ant* Colony::getAnt(std::size_t index) const
+{
+	return ants[index];
+}
+
+inline Ant* Colony::getAnt(std::size_t index)
+{
+	return ants[index];
+}
+
+
 inline const Octree<Agent*>* Colony::getAntOctree() const
 {
 	return antOctree;
diff --git a/src/states/level-select-state.cpp b/src/states/level-select-state.cpp
index 12921ca..e96ac74 100644
--- a/src/states/level-select-state.cpp
+++ b/src/states/level-select-state.cpp
@@ -109,6 +109,8 @@ void LevelSelectState::exit()
 		application->defaultLayer->removeObject(surfaceInstance);
 		application->defaultLayer->removeObject(subsurfaceInstance);
 	}
+	application->defaultLayer->removeObject(&application->biomeFloorModelInstance);
+	
 	application->levelIDLabel->setVisible(false);
 	application->levelNameLabel->setVisible(false);
 }
diff --git a/src/states/main-menu-state.cpp b/src/states/main-menu-state.cpp
index f942bf8..284896d 100644
--- a/src/states/main-menu-state.cpp
+++ b/src/states/main-menu-state.cpp
@@ -18,6 +18,7 @@
  */
 
 #include "main-menu-state.hpp"
+#include "title-state.hpp"
 #include "../application.hpp"
 #include "../debug.hpp"
 #include "../camera-controller.hpp"
@@ -235,7 +236,7 @@ void MainMenuState::execute()
 	}
 	else if (application->menuCancel.isTriggered() && !application->menuCancel.wasTriggered())
 	{
-		
+		application->changeState(application->titleState);
 	}
 	
 	float lineHeight = application->menuFont->getMetrics().getHeight();
@@ -277,7 +278,10 @@ void MainMenuState::execute()
 
 void MainMenuState::exit()
 {
-	// Remove nest
+	// Hide UI
+	application->menuSelectorLabel->setVisible(false);
+	
+	// Clear scene
 	application->defaultLayer->removeObject(&application->nestModelInstance);
 }
 
diff --git a/src/states/play-state.cpp b/src/states/play-state.cpp
index 5930455..1b8dc6a 100644
--- a/src/states/play-state.cpp
+++ b/src/states/play-state.cpp
@@ -18,6 +18,7 @@
  */
 
 #include "play-state.hpp"
+#include "level-select-state.hpp"
 #include "../application.hpp"
 #include "../camera-controller.hpp"
 #include "../game/colony.hpp"
@@ -47,13 +48,10 @@ void PlayState::enter()
 	// Setup tools
 	application->forcepsClosed = false;
 	
-	// Add background
-	//application->backgroundLayer->addObject(&application->bgCamera);
-	//application->backgroundLayer->addObject(&application->bgBatch);
-	
 	// Add terrain to scene
 	application->defaultLayer->addObject(&application->currentLevel->terrainSurface);
 	application->defaultLayer->addObject(&application->currentLevel->terrainSubsurface);
+	application->defaultLayer->addObject(&application->biomeFloorModelInstance);
 	
 	// Add forceps to scene
 	application->defaultLayer->addObject(&application->forcepsModelInstance);
@@ -116,7 +114,11 @@ void PlayState::execute()
 	
 	//application->blaImage->setRotation(iconRotation);
 	
-	
+	// Return to level select
+	if (application->menuCancel.isTriggered() && !application->menuCancel.wasTriggered())
+	{
+		application->changeState(application->levelSelectState);
+	}
 	
 	// Move camera
 	Vector2 movementVector(0.0f);
@@ -217,11 +219,29 @@ void PlayState::execute()
 
 void PlayState::exit()
 {
-	// Remove background
-	//application->backgroundLayer->removeObject(&application->bgCamera);
-	//application->backgroundLayer->removeObject(&application->bgBatch);
-	
+	// Remove input observers
 	application->mouse->removeMouseButtonObserver(this);
+	
+	// Clear scene
+	application->defaultLayer->removeObject(&application->currentLevel->terrainSurface);
+	application->defaultLayer->removeObject(&application->currentLevel->terrainSubsurface);
+	application->defaultLayer->removeObject(&application->biomeFloorModelInstance);
+	application->defaultLayer->removeObject(&application->forcepsModelInstance);
+	for (std::size_t i = 0; i < application->colony->getAntCount(); ++i)
+	{
+		Ant* ant = application->colony->getAnt(i);
+		application->defaultLayer->removeObject(ant->getModelInstance());
+	}
+	
+	// Hide HUD
+	application->pauseButtonImage->setVisible(false);
+	application->pauseButtonImage->setActive(false);
+	application->playButtonImage->setVisible(false);
+	application->playButtonImage->setActive(false);
+	application->rectangularPaletteImage->setVisible(false);
+	application->rectangularPaletteImage->setActive(false);
+	application->toolbar->getContainer()->setVisible(false);
+	application->toolbar->getContainer()->setActive(false);
 }
 
 void PlayState::mouseButtonPressed(int button, int x, int y)
diff --git a/src/states/title-state.cpp b/src/states/title-state.cpp
index 45d19f6..192d13c 100644
--- a/src/states/title-state.cpp
+++ b/src/states/title-state.cpp
@@ -169,16 +169,18 @@ void TitleState::execute()
 
 void TitleState::exit()
 {
+	// Remove input observers
+	application->inputManager->removeWindowObserver(this);
+	
+	// Hide UI
 	application->titleImage->setVisible(false);
 	application->anyKeyLabel->setVisible(false);
 	application->titleScreenInfoContainer->setVisible(false);
 	
-	// Remove objects from scene
+	// Remove clear scene
 	application->defaultLayer->removeObject(&application->antHillModelInstance);
 	application->backgroundLayer->removeObject(&application->bgCamera);
 	application->backgroundLayer->removeObject(&application->bgBatch);
-	
-	application->inputManager->removeWindowObserver(this);
 }
 
 void TitleState::windowClosed()