diff --git a/src/main/java/cz/jzitnik/game/GameSaver.java b/src/main/java/cz/jzitnik/game/GameSaver.java
index 80e6945..a0ddd2b 100644
--- a/src/main/java/cz/jzitnik/game/GameSaver.java
+++ b/src/main/java/cz/jzitnik/game/GameSaver.java
@@ -6,7 +6,6 @@ public class GameSaver {
     public void save(Game game) {
         try (ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("world.ser"))) {
             out.writeObject(game);
-            System.out.println("Inner class saved!");
         } catch (IOException e) {
             e.printStackTrace();
         }
diff --git a/src/main/java/cz/jzitnik/game/blocks/Chest.java b/src/main/java/cz/jzitnik/game/blocks/Chest.java
index 319793b..f57d4a5 100644
--- a/src/main/java/cz/jzitnik/game/blocks/Chest.java
+++ b/src/main/java/cz/jzitnik/game/blocks/Chest.java
@@ -11,11 +11,12 @@ import cz.jzitnik.tui.SpriteList;
 import org.jline.terminal.MouseEvent;
 import org.jline.terminal.Terminal;
 
+import java.io.Serializable;
 import java.util.List;
 import java.util.Optional;
 
 @RightClickLogic
-public class Chest implements RightClickHandler {
+public class Chest implements RightClickHandler, Serializable {
     private static final int ROW_AMOUNT = 4;
     private static final int COLUMN_AMOUNT = 6;
     private static final int CELL_WIDTH = 50;
diff --git a/src/main/java/cz/jzitnik/game/blocks/Furnace.java b/src/main/java/cz/jzitnik/game/blocks/Furnace.java
index bab4b93..9fd2caa 100644
--- a/src/main/java/cz/jzitnik/game/blocks/Furnace.java
+++ b/src/main/java/cz/jzitnik/game/blocks/Furnace.java
@@ -16,11 +16,12 @@ import cz.jzitnik.tui.utils.SpriteCombiner;
 import org.jline.terminal.MouseEvent;
 import org.jline.terminal.Terminal;
 
+import java.io.Serializable;
 import java.util.List;
 import java.util.Optional;
 
 @RightClickLogic
-public class Furnace implements RightClickHandler {
+public class Furnace implements RightClickHandler, Serializable {
     private final Block block;
     private final InventoryItem[] items = new InventoryItem[2];
     private InventoryItem outputItem;
diff --git a/src/main/java/cz/jzitnik/game/blocks/OakDoorData.java b/src/main/java/cz/jzitnik/game/blocks/OakDoorData.java
index b58a9ae..617d001 100644
--- a/src/main/java/cz/jzitnik/game/blocks/OakDoorData.java
+++ b/src/main/java/cz/jzitnik/game/blocks/OakDoorData.java
@@ -8,8 +8,10 @@ import cz.jzitnik.game.sprites.OakDoor;
 
 import cz.jzitnik.tui.ScreenRenderer;
 
+import java.io.Serializable;
+
 @RightClickLogic
-public class OakDoorData implements RightClickHandler {
+public class OakDoorData implements RightClickHandler, Serializable {
     private void change(Block door) {
         door.setSpriteState(switch (door.getSpriteState().get()) {
             case OakDoor.OakDoorState.TOP -> OakDoor.OakDoorState.TOPCLOSED;
diff --git a/src/main/java/cz/jzitnik/game/handlers/place/DefaultPlaceHandler.java b/src/main/java/cz/jzitnik/game/handlers/place/DefaultPlaceHandler.java
index a9c6cd7..a641bb2 100644
--- a/src/main/java/cz/jzitnik/game/handlers/place/DefaultPlaceHandler.java
+++ b/src/main/java/cz/jzitnik/game/handlers/place/DefaultPlaceHandler.java
@@ -21,7 +21,7 @@ public class DefaultPlaceHandler implements CustomPlaceHandler {
     public boolean mine(Game game, int x, int y) {
         var blocks = game.getWorld()[y][x];
 
-        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air")).toList());
+        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air") && !i.isMob()).toList());
 
         return true;
     }
diff --git a/src/main/java/cz/jzitnik/game/handlers/place/handlers/DoorPlaceHandler.java b/src/main/java/cz/jzitnik/game/handlers/place/handlers/DoorPlaceHandler.java
index f72bb36..a3faff6 100644
--- a/src/main/java/cz/jzitnik/game/handlers/place/handlers/DoorPlaceHandler.java
+++ b/src/main/java/cz/jzitnik/game/handlers/place/handlers/DoorPlaceHandler.java
@@ -43,16 +43,16 @@ public class DoorPlaceHandler implements CustomPlaceHandler {
         if (block.getSpriteState().get() == OakDoor.OakDoorState.BOTTOM
                 || block.getSpriteState().get() == OakDoor.OakDoorState.BOTTOMCLOSED) {
             var blocks2 = game.getWorld()[y - 1][x];
-            blocks2.removeAll(blocks2.stream().filter(i -> !i.getBlockId().equals("air")).toList());
+            blocks2.removeAll(blocks2.stream().filter(i -> !i.getBlockId().equals("air") && !i.isMob()).toList());
         }
 
         if (block.getSpriteState().get() == OakDoor.OakDoorState.TOP
                 || block.getSpriteState().get() == OakDoor.OakDoorState.TOPCLOSED) {
             var blocks2 = game.getWorld()[y + 1][x];
-            blocks2.removeAll(blocks2.stream().filter(i -> !i.getBlockId().equals("air")).toList());
+            blocks2.removeAll(blocks2.stream().filter(i -> !i.getBlockId().equals("air") && !i.isMob()).toList());
         }
 
-        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air")).toList());
+        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air") && !i.isMob()).toList());
 
         return true;
     }
diff --git a/src/main/java/cz/jzitnik/game/handlers/place/handlers/OakLeavesMineHandler.java b/src/main/java/cz/jzitnik/game/handlers/place/handlers/OakLeavesMineHandler.java
index 6920d27..8847dc7 100644
--- a/src/main/java/cz/jzitnik/game/handlers/place/handlers/OakLeavesMineHandler.java
+++ b/src/main/java/cz/jzitnik/game/handlers/place/handlers/OakLeavesMineHandler.java
@@ -29,7 +29,7 @@ public class OakLeavesMineHandler implements CustomPlaceHandler {
     public boolean mine(Game game, int x, int y) {
         var blocks = game.getWorld()[y][x];
 
-        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air")).toList());
+        blocks.removeAll(blocks.stream().filter(i -> !i.getBlockId().equals("air") && !i.isMob()).toList());
 
         Random random = new Random();
         int percentage = random.nextInt(100);