diff --git a/src/mightypork/gamecore/input/InputSystem.java b/src/mightypork/gamecore/input/InputSystem.java
index d394731..fd060e0 100644
--- a/src/mightypork/gamecore/input/InputSystem.java
+++ b/src/mightypork/gamecore/input/InputSystem.java
@@ -215,4 +215,28 @@ public class InputSystem extends RootBusNode implements Updateable, KeyBinder {
 	{
 		return Mouse.isButtonDown(button);
 	}
+
+
+	public static int getModifierKeys()
+	{
+		int mods = 0;
+		
+		if(Keyboard.isKeyDown(Keys.L_ALT) || Keyboard.isKeyDown(Keys.R_ALT)) {
+			mods |= Keys.MOD_ALT;
+		}
+		
+		if(Keyboard.isKeyDown(Keys.L_SHIFT) || Keyboard.isKeyDown(Keys.R_SHIFT)) {
+			mods |= Keys.MOD_SHIFT;
+		}
+		
+		if(Keyboard.isKeyDown(Keys.L_CONTROL) || Keyboard.isKeyDown(Keys.R_CONTROL)) {
+			mods |= Keys.MOD_CONTROL;
+		}
+		
+		if(Keyboard.isKeyDown(Keys.L_META) || Keyboard.isKeyDown(Keys.R_META)) {
+			mods |= Keys.MOD_META;
+		}
+		
+		return mods;
+	}
 }
diff --git a/src/mightypork/gamecore/input/KeyStroke.java b/src/mightypork/gamecore/input/KeyStroke.java
index 2bc9012..a5df576 100644
--- a/src/mightypork/gamecore/input/KeyStroke.java
+++ b/src/mightypork/gamecore/input/KeyStroke.java
@@ -15,58 +15,42 @@ import org.lwjgl.input.Keyboard;
  */
 public class KeyStroke {
 	
-	private final List<Integer> keys = new ArrayList<>(2);
+	private final int mod;
+	private final int key;
 	private final boolean fallingEdge;
 	
-	private final List<Integer> badModifs = new ArrayList<>(8);
-	
-	
-//	{
-//		badModifs.add(Keys.L_ALT);
-//		badModifs.add(Keys.L_CONTROL);
-//		badModifs.add(Keys.L_SHIFT);
-//		badModifs.add(Keys.L_META);
-//		badModifs.add(Keys.R_ALT);
-//		badModifs.add(Keys.R_CONTROL);
-//		badModifs.add(Keys.R_SHIFT);
-//		badModifs.add(Keys.R_META);
-//	}
-	
 	
 	/**
 	 * KeyStroke
 	 * 
 	 * @param fallingEdge true for falling edge, up for rising edge
-	 * @param keys keys that must be pressed
+	 * @param mod_mask mods mask
+	 * @param key key code
 	 */
-	public KeyStroke(boolean fallingEdge, int... keys)
-	{
-		badModifs.add(Keys.L_ALT);
-		badModifs.add(Keys.L_CONTROL);
-		badModifs.add(Keys.L_SHIFT);
-		badModifs.add(Keys.L_META);
-		badModifs.add(Keys.R_ALT);
-		badModifs.add(Keys.R_CONTROL);
-		badModifs.add(Keys.R_SHIFT);
-		badModifs.add(Keys.R_META);
-		
+	public KeyStroke(boolean fallingEdge, int key, int mod_mask) {
 		this.fallingEdge = fallingEdge;
-		for (final int k : keys) {
-			this.keys.add(k);
-			
-			badModifs.remove((Integer) k);
-		}
+		this.key = key;
+		this.mod = mod_mask;
+	}
+	
+	
+	/**
+	 * Rising edge keystroke
+	 * @param mod_mask mods mask
+	 * @param key key code
+	 */
+	public KeyStroke(int key, int mod_mask) {
+		this(false, key, mod_mask);
 	}
 	
 	
 	/**
 	 * Rising edge keystroke
 	 * 
-	 * @param keys
+	 * @param key key code
 	 */
-	public KeyStroke(int... keys)
-	{
-		this(false, keys);
+	public KeyStroke(int key) {
+		this(false, key, Keys.MOD_NONE);
 	}
 	
 	
@@ -75,20 +59,41 @@ public class KeyStroke {
 	 */
 	public boolean isActive()
 	{
-		boolean st = true;
+		boolean st = Keyboard.isKeyDown(key);
+		st &= (InputSystem.getModifierKeys() == mod);
+		
+		return fallingEdge ? st : !st;
+	}
+	
+	
+	@Override
+	public String toString()
+	{
+		String s = "(";
 		
-		for (final int k : keys) {
-			st &= Keyboard.isKeyDown(k);
+		if ((mod & Keys.MOD_CONTROL) != 0) {
+			s += "CTRL+";
 		}
 		
-		for (final int i : badModifs) {
-			if (Keyboard.isKeyDown(i)) {
-				st = false;
-				break;
-			}
+		if ((mod & Keys.MOD_ALT) != 0) {
+			s += "ALT+";
 		}
 		
-		return fallingEdge ? st : !st;
+		if ((mod & Keys.MOD_SHIFT) != 0) {
+			s += "SHIFT+";
+		}
+		
+		if ((mod & Keys.MOD_META) != 0) {
+			s += "META+";
+		}
+		
+		s += Keyboard.getKeyName(key);
+		
+		s += fallingEdge ? ",DOWN" : ",UP";
+		
+		s += ")";
+		
+		return s;
 	}
 	
 	
@@ -97,7 +102,9 @@ public class KeyStroke {
 	{
 		final int prime = 31;
 		int result = 1;
-		result = prime * result + ((keys == null) ? 0 : keys.hashCode());
+		result = prime * result + (fallingEdge ? 1231 : 1237);
+		result = prime * result + key;
+		result = prime * result + mod;
 		return result;
 	}
 	
@@ -107,43 +114,11 @@ public class KeyStroke {
 	{
 		if (this == obj) return true;
 		if (obj == null) return false;
-		if (!(obj instanceof KeyStroke)) return false;
-		final KeyStroke other = (KeyStroke) obj;
-		
-		if (keys == null) {
-			if (other.keys != null) return false;
-		} else if (!keys.equals(other.keys)) {
-			return false;
-		}
-		
+		if (getClass() != obj.getClass()) return false;
+		KeyStroke other = (KeyStroke) obj;
 		if (fallingEdge != other.fallingEdge) return false;
-		
+		if (key != other.key) return false;
+		if (mod != other.mod) return false;
 		return true;
 	}
-	
-	
-	@Override
-	public String toString()
-	{
-		String s = "(";
-		
-		int cnt = 0;
-		final Iterator<Integer> i = keys.iterator();
-		for (; i.hasNext(); cnt++) {
-			if (cnt > 0) s += "+";
-			s += Keyboard.getKeyName(i.next());
-		}
-		
-		s += fallingEdge ? ",DOWN" : ",UP";
-		
-		s += ")";
-		
-		return s;
-	}
-	
-	
-	public List<Integer> getKeys()
-	{
-		return keys;
-	}
 }
diff --git a/src/mightypork/gamecore/input/Keys.java b/src/mightypork/gamecore/input/Keys.java
index 435f2d6..1f6fcc9 100644
--- a/src/mightypork/gamecore/input/Keys.java
+++ b/src/mightypork/gamecore/input/Keys.java
@@ -132,6 +132,12 @@ public interface Keys {
 	public static final int PAUSE           = 0xC5; /* Pause */
 	public static final int INSERT          = 0xD2; /* Insert on arrow keypad */
 	public static final int DELETE          = 0xD3; /* Delete on arrow keypad */
+
+	public static final byte MOD_NONE = 0;
+	public static final byte MOD_ALT = 1;
+	public static final byte MOD_CONTROL = 2;
+	public static final byte MOD_SHIFT = 4;
+	public static final byte MOD_META = 8;
 	
 	//@formatter:on
 }
diff --git a/src/mightypork/gamecore/util/ion/Ion.java b/src/mightypork/gamecore/util/ion/Ion.java
index 1dc56a8..e155f34 100644
--- a/src/mightypork/gamecore/util/ion/Ion.java
+++ b/src/mightypork/gamecore/util/ion/Ion.java
@@ -182,6 +182,7 @@ public class Ion {
 	 */
 	public static void toFile(File file, IonObjBinary obj) throws IOException
 	{
+		file.getParentFile().mkdirs();
 		try(OutputStream out = new FileOutputStream(file)) {
 			
 			toStream(out, obj);
diff --git a/src/mightypork/rogue/App.java b/src/mightypork/rogue/App.java
index fcf8a61..6bdd24c 100644
--- a/src/mightypork/rogue/App.java
+++ b/src/mightypork/rogue/App.java
@@ -26,6 +26,7 @@ import mightypork.rogue.screens.LoadingOverlay;
 import mightypork.rogue.screens.game.ScreenGame;
 import mightypork.rogue.screens.menu.ScreenMainMenu;
 import mightypork.rogue.screens.select_world.ScreenSelectWorld;
+import mightypork.rogue.world.Inventory;
 import mightypork.rogue.world.WorldProvider;
 import mightypork.rogue.world.level.Level;
 
@@ -78,6 +79,7 @@ public final class App extends BaseApp {
 		super.registerIonizables();
 		
 		Ion.registerType(Level.ION_MARK, Level.class);
+		Ion.registerType(Inventory.ION_MARK, Inventory.class);
 	}
 	
 	
@@ -132,14 +134,18 @@ public final class App extends BaseApp {
 		bindEventToKey(new ActionRequest(RequestType.FULLSCREEN), Keys.F11);
 		bindEventToKey(new ActionRequest(RequestType.SCREENSHOT), Keys.F2);
 		
-		bindEventToKey(new GameStateRequest(GameState.EXIT), Keys.L_CONTROL, Keys.Q);
-		bindEventToKey(new GameStateRequest(GameState.MAIN_MENU), Keys.L_CONTROL, Keys.M);
+		bindEventToKey(new GameStateRequest(GameState.EXIT), Keys.Q, Keys.MOD_CONTROL);
+		bindEventToKey(new GameStateRequest(GameState.MAIN_MENU), Keys.M, Keys.MOD_CONTROL);
 	}
 	
+	private void bindEventToKey(final BusEvent<?> event, int key)
+	{
+		bindEventToKey(event, key, Keys.MOD_NONE);
+	}
 	
-	private void bindEventToKey(final BusEvent<?> event, int... keys)
+	private void bindEventToKey(final BusEvent<?> event, int key, byte mod)
 	{
-		getInput().bindKey(new KeyStroke(keys), new Runnable() {
+		getInput().bindKey(new KeyStroke(key, mod), new Runnable() {
 			
 			@Override
 			public void run()
diff --git a/src/mightypork/rogue/screens/LoaderRequest.java b/src/mightypork/rogue/screens/LoaderRequest.java
index c4678a7..645b360 100644
--- a/src/mightypork/rogue/screens/LoaderRequest.java
+++ b/src/mightypork/rogue/screens/LoaderRequest.java
@@ -5,28 +5,18 @@ import mightypork.gamecore.eventbus.BusEvent;
 
 public class LoaderRequest extends BusEvent<LoadingOverlay> {
 	
-	private final boolean show;
 	private final String msg;
+	private Runnable task;
 	
 
-	public LoaderRequest(boolean show, String msg) {
-		this.show = show;
+	public LoaderRequest(String msg, Runnable task) {
+		this.task = task;
 		this.msg = msg;
 	}
-
-	public LoaderRequest(boolean show) {
-		this.show = show;
-		this.msg = null;
-	}
-
 	@Override
 	protected void handleBy(LoadingOverlay handler)
 	{
-		if(show) {
-			handler.show(msg);
-		}else {
-			handler.hide();
-		}
+		handler.show(msg, task);
 	}
 	
 }
diff --git a/src/mightypork/rogue/screens/LoadingOverlay.java b/src/mightypork/rogue/screens/LoadingOverlay.java
index c77ce14..18796c0 100644
--- a/src/mightypork/rogue/screens/LoadingOverlay.java
+++ b/src/mightypork/rogue/screens/LoadingOverlay.java
@@ -7,6 +7,7 @@ import mightypork.gamecore.gui.components.painters.QuadPainter;
 import mightypork.gamecore.gui.components.painters.TextPainter;
 import mightypork.gamecore.gui.events.ScreenRequest;
 import mightypork.gamecore.gui.screens.Overlay;
+import mightypork.gamecore.util.Utils;
 import mightypork.gamecore.util.math.Easing;
 import mightypork.gamecore.util.math.color.Color;
 import mightypork.gamecore.util.math.color.pal.PAL16;
@@ -36,7 +37,29 @@ public class LoadingOverlay extends Overlay {
 			return msg == null ? "" : msg;
 		}
 	};
+	
+	private boolean busy;
 	private String msg;
+	private Runnable task;
+	
+	private TimedTask tt = new TimedTask() {
+		
+		@Override
+		public void run()
+		{
+			Utils.runAsThread(new Runnable() {
+				
+				@Override
+				public void run()
+				{
+					task.run();
+					alpha.setEasing(Easing.SINE_OUT);
+					alpha.fadeOut(T_OUT);
+					busy = false;
+				}
+			});
+		}
+	};
 	
 	
 	public LoadingOverlay(AppAccess app) {
@@ -47,6 +70,7 @@ public class LoadingOverlay extends Overlay {
 		root.add(qp);
 		
 		updated.add(alpha);
+		updated.add(tt);
 		
 		Rect textRect = root.shrink(Num.ZERO, root.height().perc(48));
 		textRect = textRect.moveY(root.height().perc(-10));
@@ -54,7 +78,7 @@ public class LoadingOverlay extends Overlay {
 		final TextPainter tp = new TextPainter(Res.getFont("thick"), AlignX.CENTER, RGB.WHITE, msgStrProv);
 		
 		tp.setRect(textRect);
-		tp.setShadow(RGB.BLACK_60, tp.height().mul(1/8D).toVectXY());
+		tp.setShadow(RGB.BLACK_60, tp.height().mul(1 / 8D).toVectXY());
 		root.add(tp);
 	}
 	
@@ -66,21 +90,21 @@ public class LoadingOverlay extends Overlay {
 	}
 	
 	
-	public void show(String message)
+	public void show(String message, Runnable task)
 	{
+		if(busy) throw new IllegalStateException("Loader is busy with another task.");
+		
 		this.msg = message;
+		this.task = task;
+		this.busy = true;
+		
 		alpha.setEasing(Easing.SINE_IN);
 		alpha.fadeIn(T_IN);
-	}
-	
-	
-	public void hide()
-	{
 		
-		alpha.setEasing(Easing.SINE_OUT);
-		alpha.fadeOut(T_OUT);
+		tt.start(T_IN);
 	}
 	
+	
 	@Override
 	public void render()
 	{
diff --git a/src/mightypork/rogue/screens/game/ScreenGame.java b/src/mightypork/rogue/screens/game/ScreenGame.java
index 327ac47..ded51cb 100644
--- a/src/mightypork/rogue/screens/game/ScreenGame.java
+++ b/src/mightypork/rogue/screens/game/ScreenGame.java
@@ -1,6 +1,8 @@
 package mightypork.rogue.screens.game;
 
 
+import java.io.File;
+import java.io.IOException;
 import java.util.Random;
 
 import mightypork.gamecore.app.AppAccess;
@@ -9,6 +11,7 @@ import mightypork.gamecore.gui.ActionGroup;
 import mightypork.gamecore.gui.screens.LayeredScreen;
 import mightypork.gamecore.input.KeyStroke;
 import mightypork.gamecore.input.Keys;
+import mightypork.gamecore.logging.Log;
 import mightypork.gamecore.util.math.Calc;
 import mightypork.rogue.Config;
 import mightypork.rogue.world.PlayerFacade;
@@ -84,7 +87,38 @@ public class ScreenGame extends LayeredScreen {
 			worldLayer.map.toggleMag();
 		}
 	};
-	
+
+	public Action actionSave = new Action() {
+		
+		@Override
+		public void execute()
+		{
+			try {
+				WorldProvider.get().saveWorld();
+				WorldProvider.get().getWorld().getConsole().msgWorldSaved();
+			} catch (Exception e) {
+				Log.e("Could not save the world.", e);
+				WorldProvider.get().getWorld().getConsole().msgWorldSaveError();
+			}
+		}
+	};
+
+	public Action actionRestore = new Action() {
+		
+		@Override
+		public void execute()
+		{
+			try {
+				File f = WorldProvider.get().getWorld().getSaveFile();
+				WorldProvider.get().loadWorld(f);
+				WorldProvider.get().getWorld().getConsole().msgReloaded();
+				
+			} catch (Exception e) {
+				Log.e("Could not load the world.", e);
+				WorldProvider.get().getWorld().getConsole().msgLoadFailed();
+			}
+		}
+	};
 	
 	/**
 	 * Set gui state (overlay)
@@ -142,7 +176,7 @@ public class ScreenGame extends LayeredScreen {
 		worldLayer.setVisible(true);
 		
 		// TODO temporary here ↓
-		bindKey(new KeyStroke(Keys.L_CONTROL, Keys.N), new Runnable() {
+		bindKey(new KeyStroke(Keys.N, Keys.MOD_CONTROL), new Runnable() {
 			
 			@Override
 			public void run()
@@ -160,6 +194,9 @@ public class ScreenGame extends LayeredScreen {
 		bindKey(new KeyStroke(Keys.E), actionEat);
 		bindKey(new KeyStroke(Keys.M), actionToggleMinimap);
 		bindKey(new KeyStroke(Keys.Z), actionToggleZoom);
+
+		bindKey(new KeyStroke(Keys.R, Keys.MOD_CONTROL), actionRestore);
+		bindKey(new KeyStroke(Keys.S, Keys.MOD_CONTROL), actionSave);
 		
 		// add as actions - enableables.
 		worldActions.add(worldLayer);
@@ -170,6 +207,9 @@ public class ScreenGame extends LayeredScreen {
 		worldActions.add(actionTogglePause);
 		worldActions.add(actionToggleZoom);
 		
+		worldActions.add(actionSave);
+		worldActions.add(actionRestore);
+		
 		worldActions.enable(true);
 		
 		// TMP TODO remove
diff --git a/src/mightypork/rogue/screens/select_world/WorldSlot.java b/src/mightypork/rogue/screens/select_world/WorldSlot.java
index 777f319..fd55400 100644
--- a/src/mightypork/rogue/screens/select_world/WorldSlot.java
+++ b/src/mightypork/rogue/screens/select_world/WorldSlot.java
@@ -14,6 +14,7 @@ import mightypork.gamecore.gui.components.painters.QuadPainter;
 import mightypork.gamecore.gui.components.painters.TextPainter;
 import mightypork.gamecore.gui.events.CrossfadeRequest;
 import mightypork.gamecore.gui.events.ScreenRequest;
+import mightypork.gamecore.logging.Log;
 import mightypork.gamecore.resources.fonts.GLFont;
 import mightypork.gamecore.util.Utils;
 import mightypork.gamecore.util.ion.Ion;
@@ -91,28 +92,44 @@ public class WorldSlot extends ConstraintLayout {
 					msg = "Creating world...";
 				}
 				
-				getEventBus().send(new LoaderRequest(true, msg));
-				
-				Utils.runAsThread(new Runnable() {
+				getEventBus().send(new LoaderRequest(msg, new Runnable() {
 					
 					@Override
 					public void run()
 					{
-						try {
-							final World w = new World();
-							w.setSaveFile(file);
-							w.load(worldBundle);
-							WorldProvider.get().setWorld(w);
-						} catch (final Exception e) {
-							WorldProvider.get().createWorld(Double.doubleToLongBits(Math.random()));
+						World w;
+						
+						if (worldBundle == null) {
+							
+							try {
+								w = WorldProvider.get().createWorld(Double.doubleToLongBits(Math.random()));
+								w.setSaveFile(file);
+								
+								WorldProvider.get().saveWorld();
+								
+								getEventBus().send(new ScreenRequest("game"));
+								
+							} catch (Exception e) {
+								Log.e("Could not create & save the world.", e);
+							}
+							
+						} else {
+							
+							try {
+								w = new World();
+								w.setSaveFile(file);
+								w.load(worldBundle);
+								WorldProvider.get().setWorld(w);
+								
+								getEventBus().send(new ScreenRequest("game"));
+								
+							} catch (IOException e) {
+								Log.e("Could not load the world.", e);
+							}
 						}
 						
-						getEventBus().send(new LoaderRequest(false));
-						//getEventBus().send(new GameStateRequest(GameState.PLAY_WORLD));
-
-						getEventBus().send(new ScreenRequest("game"));
 					}
-				});
+				}));
 				
 			}
 		});
diff --git a/src/mightypork/rogue/world/Inventory.java b/src/mightypork/rogue/world/Inventory.java
index 9d12a41..a5e8586 100644
--- a/src/mightypork/rogue/world/Inventory.java
+++ b/src/mightypork/rogue/world/Inventory.java
@@ -12,7 +12,7 @@ import mightypork.rogue.world.item.Items;
 
 public class Inventory implements IonObjBinary {
 	
-	private static final short ION_MARK = 0;
+	public static final short ION_MARK = 54;
 	private Item[] items;
 	
 	
diff --git a/src/mightypork/rogue/world/World.java b/src/mightypork/rogue/world/World.java
index f3281cb..dfc9232 100644
--- a/src/mightypork/rogue/world/World.java
+++ b/src/mightypork/rogue/world/World.java
@@ -11,6 +11,7 @@ import mightypork.gamecore.eventbus.BusAccess;
 import mightypork.gamecore.eventbus.EventBus;
 import mightypork.gamecore.eventbus.clients.DelegatingClient;
 import mightypork.gamecore.eventbus.events.Updateable;
+import mightypork.gamecore.logging.Log;
 import mightypork.gamecore.util.ion.IonBundle;
 import mightypork.gamecore.util.ion.IonObjBundled;
 import mightypork.gamecore.util.math.algo.Coord;
@@ -79,9 +80,12 @@ public class World implements DelegatingClient, BusAccess, IonObjBundled, Pausea
 		
 		in.loadBundled("player", playerData);
 		
-		playerEntity = levels.get(playerData.getLevelNumber()).getEntity(playerData.getEID());
+		int eid = playerData.getEID();
+		int lvl = playerData.getLevelNumber();
+		
+		playerEntity = levels.get(lvl).getEntity(eid);
 		if (playerEntity == null) {
-			throw new RuntimeException("Player entity not found in the world.");
+			throw new RuntimeException("Player entity not found in the world: " + eid + " on floor " + lvl);
 		}
 	}
 	
@@ -212,6 +216,8 @@ public class World implements DelegatingClient, BusAccess, IonObjBundled, Pausea
 		
 		// update console timing - not as child client
 		console.update(delta);
+		
+		if (saveFile == null) Log.w("World has no save file.");
 	}
 	
 	
diff --git a/src/mightypork/rogue/world/WorldConsole.java b/src/mightypork/rogue/world/WorldConsole.java
index 59dbe79..b120e38 100644
--- a/src/mightypork/rogue/world/WorldConsole.java
+++ b/src/mightypork/rogue/world/WorldConsole.java
@@ -34,8 +34,7 @@ public class WorldConsole implements Updateable {
 		private double elapsed = 0;
 		
 		
-		private Entry(String text)
-		{
+		private Entry(String text) {
 			this.text = text;
 			this.fadeout = new NumAnimated(1, Easing.LINEAR);
 			this.fadeout.setDefaultDuration(0.5);
@@ -196,4 +195,28 @@ public class WorldConsole implements Updateable {
 	{
 		addMessage("Your " + item.getVisualName() + " has broken!");
 	}
+	
+	
+	public void msgWorldSaved()
+	{
+		addMessage("Game saved to file.");
+	}
+	
+	
+	public void msgWorldSaveError()
+	{
+		addMessage("Error while saving; See the log for details.");
+	}
+
+
+	public void msgReloaded()
+	{
+		addMessage("World loaded from file.");
+	}
+
+
+	public void msgLoadFailed()
+	{
+		addMessage("Error while loading; See the log for details.");
+	}
 }
diff --git a/src/mightypork/rogue/world/WorldProvider.java b/src/mightypork/rogue/world/WorldProvider.java
index 4672a6b..e4fd04e 100644
--- a/src/mightypork/rogue/world/WorldProvider.java
+++ b/src/mightypork/rogue/world/WorldProvider.java
@@ -21,8 +21,7 @@ public class WorldProvider extends RootBusNode {
 	}
 	
 	
-	public WorldProvider(BusAccess busAccess)
-	{
+	public WorldProvider(BusAccess busAccess) {
 		super(busAccess);
 		setListening(false);
 	}
@@ -50,9 +49,11 @@ public class WorldProvider extends RootBusNode {
 	};
 	
 	
-	public void createWorld(long seed)
+	public World createWorld(long seed)
 	{
-		setWorld(WorldCreator.createWorld(seed));
+		World w = WorldCreator.createWorld(seed);
+		setWorld(w);
+		return w;
 	}
 	
 	
@@ -83,6 +84,7 @@ public class WorldProvider extends RootBusNode {
 	public void loadWorld(File file) throws IOException
 	{
 		setWorld(Ion.fromFile(file, World.class));
+		world.setSaveFile(file);
 	}
 	
 	
diff --git a/src/mightypork/rogue/world/entity/impl/BossRatAi.java b/src/mightypork/rogue/world/entity/impl/BossRatAi.java
index e1addde..8151826 100644
--- a/src/mightypork/rogue/world/entity/impl/BossRatAi.java
+++ b/src/mightypork/rogue/world/entity/impl/BossRatAi.java
@@ -29,14 +29,14 @@ public class BossRatAi extends GrayRatAi {
 	@Override
 	protected int getAttackStrength()
 	{
-		return Calc.randInt(5, 11);
+		return Calc.randInt(3, 11);
 	}
 	
 	
 	@Override
 	protected int getPreyAbandonDistance()
 	{
-		return Calc.randInt(15, 18);
+		return Calc.randInt(12, 18);
 	}
 	
 	
@@ -44,6 +44,13 @@ public class BossRatAi extends GrayRatAi {
 	public void update(double delta)
 	{
 		super.update(delta);
+		
 		healTimer.update(delta);
 	}
+	
+	@Override
+	protected double getStepTime()
+	{
+		return isIdle() ? 0.6 : 0.4;
+	}
 }
diff --git a/src/mightypork/rogue/world/entity/impl/BrownRatAi.java b/src/mightypork/rogue/world/entity/impl/BrownRatAi.java
index f86553c..68eb9da 100644
--- a/src/mightypork/rogue/world/entity/impl/BrownRatAi.java
+++ b/src/mightypork/rogue/world/entity/impl/BrownRatAi.java
@@ -19,20 +19,26 @@ public class BrownRatAi extends GrayRatAi {
 	@Override
 	protected double getScanRadius()
 	{
-		return isSleeping() ? Calc.randInt(3, 5) : Calc.randInt(5, 8);
+		return isIdle() ? Calc.randInt(2, 4) : Calc.randInt(5, 8);
 	}
 	
 	
 	@Override
 	protected int getAttackStrength()
 	{
-		return Calc.randInt(2, 5);
+		return Calc.randInt(1, 4);
 	}
 	
 	
 	@Override
 	protected int getPreyAbandonDistance()
 	{
-		return Calc.randInt(11, 14);
+		return Calc.randInt(7, 12);
+	}
+	
+	@Override
+	protected double getStepTime()
+	{
+		return isIdle() ? 0.5 : 0.38;
 	}
 }
diff --git a/src/mightypork/rogue/world/entity/impl/EntityBossRat.java b/src/mightypork/rogue/world/entity/impl/EntityBossRat.java
index 9459315..fd3f7a1 100644
--- a/src/mightypork/rogue/world/entity/impl/EntityBossRat.java
+++ b/src/mightypork/rogue/world/entity/impl/EntityBossRat.java
@@ -27,7 +27,6 @@ public class EntityBossRat extends Entity {
 		addModule("ai", ai);
 		pos.addMoveListener(ai);
 		
-		pos.setStepTime(0.4);
 		setDespawnDelay(1);
 		
 		health.setHealthMax(80);
diff --git a/src/mightypork/rogue/world/entity/impl/EntityBrownRat.java b/src/mightypork/rogue/world/entity/impl/EntityBrownRat.java
index 091e17e..f5b0159 100644
--- a/src/mightypork/rogue/world/entity/impl/EntityBrownRat.java
+++ b/src/mightypork/rogue/world/entity/impl/EntityBrownRat.java
@@ -28,7 +28,6 @@ public class EntityBrownRat extends Entity {
 		addModule("ai", ai);
 		pos.addMoveListener(ai);
 		
-		pos.setStepTime(0.38); // faster than gray rat
 		setDespawnDelay(1);
 		
 		health.setHealthMax(20);
diff --git a/src/mightypork/rogue/world/entity/impl/EntityGrayRat.java b/src/mightypork/rogue/world/entity/impl/EntityGrayRat.java
index aaf79bc..2671829 100644
--- a/src/mightypork/rogue/world/entity/impl/EntityGrayRat.java
+++ b/src/mightypork/rogue/world/entity/impl/EntityGrayRat.java
@@ -28,7 +28,6 @@ public class EntityGrayRat extends Entity {
 		addModule("ai", ai);
 		pos.addMoveListener(ai);
 		
-		pos.setStepTime(0.5);
 		setDespawnDelay(1);
 		
 		health.setHealthMax(6);
diff --git a/src/mightypork/rogue/world/entity/impl/GrayRatAi.java b/src/mightypork/rogue/world/entity/impl/GrayRatAi.java
index 02d3194..17453e2 100644
--- a/src/mightypork/rogue/world/entity/impl/GrayRatAi.java
+++ b/src/mightypork/rogue/world/entity/impl/GrayRatAi.java
@@ -19,7 +19,7 @@ public class GrayRatAi extends MonsterAi {
 	@Override
 	protected double getScanRadius()
 	{
-		return isSleeping() ? Calc.randInt(2, 4) : Calc.randInt(4, 6);
+		return isIdle() ? Calc.randInt(2, 3) : Calc.randInt(4, 6);
 	}
 	
 	
@@ -33,27 +33,20 @@ public class GrayRatAi extends MonsterAi {
 	@Override
 	protected int getAttackStrength()
 	{
-		return 1 + (Calc.rand.nextInt(5) == 0 ? 1 : 0);
+		return Calc.randInt(1, 2);
 	}
 	
 	
 	@Override
 	protected int getPreyAbandonDistance()
 	{
-		return Calc.randInt(8, 11);
+		return Calc.randInt(7, 11);
 	}
-	
-	
-	@Override
-	protected boolean shouldSkipScan()
-	{
-		return false;
-	}
-	
+
 	
 	@Override
-	protected boolean shouldRandomlyAbandonPrey()
+	protected double getStepTime()
 	{
-		return false;
+		return isIdle() ? 0.7 : 0.5;
 	}
 }
diff --git a/src/mightypork/rogue/world/entity/impl/MonsterAi.java b/src/mightypork/rogue/world/entity/impl/MonsterAi.java
index b87cafc..9a5e627 100644
--- a/src/mightypork/rogue/world/entity/impl/MonsterAi.java
+++ b/src/mightypork/rogue/world/entity/impl/MonsterAi.java
@@ -22,7 +22,6 @@ import mightypork.rogue.world.tile.Tile;
 
 public class MonsterAi extends EntityModule implements EntityMoveListener {
 	
-	private boolean sleeping = true;
 	private boolean chasing = false;
 	
 	private final AiTimer timerFindPrey = new AiTimer(3) {
@@ -30,17 +29,17 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		@Override
 		public void run()
 		{
-			if (chasing) return;
+			if (!isIdle()) return;
 			lookForTarget();
 		}
 	};
 	
-	private final AiTimer timerAttack = new AiTimer(3) {
+	private final AiTimer timerAttack = new AiTimer(1) {
 		
 		@Override
 		public void run()
 		{
-			if (!chasing) return;
+			if (!isChasing()) return;
 			
 			final Entity prey = getPreyEntity();
 			
@@ -50,6 +49,21 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		}
 	};
 	
+	private final AiTimer timerRandomWalk = new AiTimer(0.2) {
+		
+		@Override
+		public void run()
+		{
+			if (!isIdle()) return;
+			
+			if(entity.pos.isMoving()) return;
+			
+			if(Calc.rand.nextInt(10) == 0) {
+				entity.pos.addStep(Sides.randomCardinal());
+			}
+		}
+	};
+	
 	private PathFinder noDoorPf;
 	
 	/** Prey id */
@@ -84,18 +98,13 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 	{
 		if (entity.isDead()) return;
 		
-		if (chasing) {
+		if (isChasing()) {
 			final Entity prey = getPreyEntity();
 			if (!isPreyValid(prey)) {
 				stopChasing();
 				return;
 			}
 			
-			if (shouldRandomlyAbandonPrey()) {
-				stopChasing();
-				return;
-			}
-			
 			if (!isPreyInAttackRange(prey)) {
 				stepTowardsPrey(prey);
 			}
@@ -122,7 +131,6 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		bundle.putBundled("tattack", timerAttack);
 		
 		bundle.put("chasing", chasing);
-		bundle.put("sleeping", sleeping);
 		
 		bundle.put("prey", preyId);
 	}
@@ -135,7 +143,6 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		bundle.loadBundled("tattack", timerAttack);
 		
 		chasing = bundle.get("chasing", chasing);
-		sleeping = bundle.get("sleeping", sleeping);
 		
 		preyId = bundle.get("prey", preyId);
 	}
@@ -155,46 +162,39 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		
 		timerFindPrey.update(delta);
 		timerAttack.update(delta);
+		timerRandomWalk.update(delta);
 		
-		if (chasing && !entity.pos.isMoving()) {
+		// go after the prey
+		if (isChasing() && !entity.pos.isMoving()) {
 			final Entity prey = getPreyEntity();
 			if (prey == null) {
 				// prey killed and cleaned from level
 				stopChasing();
-				return;
 			}
 			
 			if (!isPreyInAttackRange(prey)) {
 				stepTowardsPrey(prey);
-				return;
 			}
 		}
 		
-		if (sleeping && shouldRandomlyWake()) {
-			sleeping = false;
-		}
-		
-		if (!chasing && shouldRandomlyFallAsleep()) {
-			sleeping = true;
-		}
-		
-		if (!chasing && !sleeping && !entity.pos.isMoving() && Calc.rand.nextInt(10) == 0) {
-			entity.pos.addStep(Sides.randomCardinal());
-		}
 	}
 	
 	
-	public boolean isSleeping()
+	public boolean isIdle()
 	{
-		return sleeping;
+		return !chasing;
 	}
+
+	
 	
+	public boolean isChasing()
+	{
+		return chasing;
+	}
 	
 	private void lookForTarget()
 	{
 		if (entity.isDead()) return;
-		
-		if (shouldSkipScan()) return; // not hungry right now
 			
 		final Entity prey = entity.getLevel().getClosestEntity(entity.pos.getVisualPos(), EntityType.PLAYER, getScanRadius());
 		if (prey != null) {
@@ -233,7 +233,8 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		
 		preyId = prey.getEntityId();
 		chasing = true;
-		sleeping = false;
+		
+		entity.pos.setStepTime(getStepTime());
 		
 		// follow this one prey
 		timerFindPrey.pause();
@@ -245,6 +246,9 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 	private void stopChasing()
 	{
 		chasing = false;
+		
+		entity.pos.setStepTime(getStepTime());
+		
 		preyId = -1;
 		timerFindPrey.restart();
 	}
@@ -266,7 +270,7 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		
 		// if close enough
 		if (isPreyInAttackRange(prey)) {
-			attackPrey(prey);
+			// attack using the timed loop
 			return;
 		}
 		
@@ -307,7 +311,7 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 	@DefaultImpl
 	protected double getScanRadius()
 	{
-		return sleeping ? Calc.randInt(1, 3) : Calc.randInt(4, 8); // For override
+		return isIdle() ? Calc.randInt(1, 3) : Calc.randInt(4, 8); // For override
 	}
 	
 	
@@ -331,31 +335,9 @@ public class MonsterAi extends EntityModule implements EntityMoveListener {
 		return 1; // For override
 	}
 	
-	
-	@DefaultImpl
-	protected boolean shouldSkipScan()
-	{
-		return false;
-	}
-	
-	
-	@DefaultImpl
-	protected boolean shouldRandomlyAbandonPrey()
-	{
-		return false;
-	}
-	
-	
-	@DefaultImpl
-	protected boolean shouldRandomlyWake()
-	{
-		return Calc.rand.nextInt(10) == 0;
-	}
-	
-	
 	@DefaultImpl
-	protected boolean shouldRandomlyFallAsleep()
+	protected double getStepTime()
 	{
-		return Calc.rand.nextInt(8) == 0;
+		return isIdle() ? 0.7 : 0.4;
 	}
 }
diff --git a/src/mightypork/rogue/world/gui/interaction/MIPKeyboard.java b/src/mightypork/rogue/world/gui/interaction/MIPKeyboard.java
index 7404aee..13e2e22 100644
--- a/src/mightypork/rogue/world/gui/interaction/MIPKeyboard.java
+++ b/src/mightypork/rogue/world/gui/interaction/MIPKeyboard.java
@@ -17,7 +17,6 @@ import mightypork.rogue.world.gui.MapView;
 public class MIPKeyboard extends MapInteractionPlugin implements PlayerStepEndListener, KeyListener, Updateable {
 	
 	private static final int[] keys = { Keys.LEFT, Keys.RIGHT, Keys.UP, Keys.DOWN };
-	private static final int[] keys2 = { Keys.A, Keys.D, Keys.W, Keys.S };
 	private static final Step[] sides = { Sides.W, Sides.E, Sides.N, Sides.S };
 	
 	
@@ -44,12 +43,16 @@ public class MIPKeyboard extends MapInteractionPlugin implements PlayerStepEndLi
 	@Override
 	public void receive(KeyEvent evt)
 	{
-		if (isImmobile()) return;
+		if (isImmobile()) {
+			return;
+		}
 		
 		if (evt.isDown() || mapView.plc.getPlayer().isMoving()) return; // not interested
 		
+		if(InputSystem.getModifierKeys() != Keys.MOD_NONE) return;
+		
 		for (int i = 0; i < 4; i++) {
-			if (evt.getKey() == keys[i] || evt.getKey() == keys2[i]) {
+			if (evt.getKey() == keys[i]) {
 				mapView.plc.clickTile(sides[i]);
 			}
 		}
@@ -62,8 +65,12 @@ public class MIPKeyboard extends MapInteractionPlugin implements PlayerStepEndLi
 		
 		if (mapView.plc.getPlayer().getMoveProgress() < 0.8) return false;
 		
+
+		if(InputSystem.getModifierKeys() != Keys.MOD_NONE) return false;
+		
+		
 		for (int i = 0; i < 4; i++) {
-			if (InputSystem.isKeyDown(keys[i]) || InputSystem.isKeyDown(keys2[i])) {
+			if (InputSystem.isKeyDown(keys[i])) {
 				
 				final Step side = sides[i];
 				if (mapView.plc.canGo(side)) {
diff --git a/src/mightypork/rogue/world/level/Level.java b/src/mightypork/rogue/world/level/Level.java
index bcdaffc..1606443 100644
--- a/src/mightypork/rogue/world/level/Level.java
+++ b/src/mightypork/rogue/world/level/Level.java
@@ -24,6 +24,7 @@ import mightypork.gamecore.util.math.noise.NoiseGen;
 import mightypork.rogue.world.World;
 import mightypork.rogue.world.entity.Entities;
 import mightypork.rogue.world.entity.Entity;
+import mightypork.rogue.world.entity.EntityPathFinder;
 import mightypork.rogue.world.entity.EntityType;
 import mightypork.rogue.world.entity.impl.PlayerEntity;
 import mightypork.rogue.world.item.Item;
@@ -123,13 +124,11 @@ public class Level implements BusAccess, Updateable, DelegatingClient, Toggleabl
 	private double timeSinceLastEntitySort;
 	
 	
-	public Level()
-	{
+	public Level() {
 	}
 	
 	
-	public Level(int width, int height)
-	{
+	public Level(int width, int height) {
 		size.setTo(width, height);
 		buildArray();
 	}
@@ -165,7 +164,7 @@ public class Level implements BusAccess, Updateable, DelegatingClient, Toggleabl
 	public final Tile getTile(Coord pos)
 	{
 		if (!pos.isInRange(0, 0, size.x - 1, size.y - 1)) return Tiles.NULL.createTile(); // out of range
-		
+			
 		return tiles[pos.y][pos.x];
 	}
 	
@@ -257,6 +256,9 @@ public class Level implements BusAccess, Updateable, DelegatingClient, Toggleabl
 			ent.setLevel(this);
 			occupyTile(ent.getCoord());
 			entityMap.put(ent.getEntityId(), ent);
+			if (ent instanceof PlayerEntity) {
+				playerCount++;
+			}
 		}
 	}
 	
@@ -366,7 +368,7 @@ public class Level implements BusAccess, Updateable, DelegatingClient, Toggleabl
 		
 		// further
 		for (int i = 0; i < 20; i++) {
-			final Coord c = pos.add(Calc.randInt(-2, 2),Calc.randInt(-2, 2));
+			final Coord c = pos.add(Calc.randInt(-2, 2), Calc.randInt(-2, 2));
 			if (addEntity(entity, c)) return true;
 		}