diff --git a/pom.xml b/pom.xml
index 0882215..2a9bf26 100644
--- a/pom.xml
+++ b/pom.xml
@@ -128,6 +128,12 @@
             <artifactId>slf4j-simple</artifactId>
             <version>2.0.17</version>
         </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.datatype</groupId>
+            <artifactId>jackson-datatype-jdk8</artifactId>
+            <version>2.15.0</version> <!-- Use the latest version -->
+        </dependency>
     </dependencies>
 
 </project>
diff --git a/src/main/java/cz/jzitnik/Main.java b/src/main/java/cz/jzitnik/Main.java
index 1478a16..2aa20ba 100644
--- a/src/main/java/cz/jzitnik/Main.java
+++ b/src/main/java/cz/jzitnik/Main.java
@@ -1,6 +1,6 @@
 package cz.jzitnik;
 
-import cz.jzitnik.game.Game;
+import cz.jzitnik.game.GameSaver;
 import cz.jzitnik.game.logic.CustomLogicProvider;
 import cz.jzitnik.game.mobs.EntityLogicProvider;
 import cz.jzitnik.game.threads.HealthRegenerationThread;
@@ -28,7 +28,7 @@ public class Main {
 
             var spriteList = SpriteLoader.load();
             var screenRenderer = new ScreenRenderer(spriteList, terminal);
-            var game = new Game();
+            var game = GameSaver.load();
 
             final boolean[] isRunning = { true };
 
diff --git a/src/main/java/cz/jzitnik/game/Game.java b/src/main/java/cz/jzitnik/game/Game.java
index 3a2c290..dc3600c 100644
--- a/src/main/java/cz/jzitnik/game/Game.java
+++ b/src/main/java/cz/jzitnik/game/Game.java
@@ -22,12 +22,14 @@ import lombok.Getter;
 import lombok.Setter;
 import org.jline.terminal.Terminal;
 
+import java.io.Serial;
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 @Getter
-public class Game {
+public class Game implements Serializable {
     @SuppressWarnings("unchecked")
     private final List<Block>[][] world = (List<Block>[][]) new CopyOnWriteArrayList[256][512];
     private final Player player = new Player();
@@ -36,11 +38,17 @@ public class Game {
     private Window window = Window.WORLD;
     private final Inventory inventory = new Inventory();
 
-    @JsonIgnore
-    private final EntitySpawnProvider entitySpawnProvider = new EntitySpawnProvider();
+    private transient EntitySpawnProvider entitySpawnProvider = new EntitySpawnProvider();
 
-    @JsonIgnore
-    private final GameStates gameStates = new GameStates(this);
+    private transient GameStates gameStates = new GameStates(this);
+
+    @Serial
+    private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+        in.defaultReadObject();
+
+        entitySpawnProvider = new EntitySpawnProvider();
+        gameStates = new GameStates(this);
+    }
 
     public Game() {
         Generation.generateWorld(this);
diff --git a/src/main/java/cz/jzitnik/game/GameSaver.java b/src/main/java/cz/jzitnik/game/GameSaver.java
new file mode 100644
index 0000000..80e6945
--- /dev/null
+++ b/src/main/java/cz/jzitnik/game/GameSaver.java
@@ -0,0 +1,41 @@
+package cz.jzitnik.game;
+
+import java.io.*;
+
+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();
+        }
+    }
+
+    public static Game load() {
+        File file = new File("world.ser");
+
+        if (!file.isFile()) {
+            return new Game();
+        }
+
+        try {
+            FileInputStream fileIn = new FileInputStream("world.ser");
+
+            ObjectInputStream in = new ObjectInputStream(fileIn);
+
+            // Read the object from the file
+            Object object = in.readObject();
+
+            Game game = (Game) object;
+
+            in.close();
+            fileIn.close();
+
+            return game;
+        } catch (IOException | ClassNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+
+    }
+}
diff --git a/src/main/java/cz/jzitnik/game/entities/Block.java b/src/main/java/cz/jzitnik/game/entities/Block.java
index f90b3b0..a5f9046 100644
--- a/src/main/java/cz/jzitnik/game/entities/Block.java
+++ b/src/main/java/cz/jzitnik/game/entities/Block.java
@@ -8,20 +8,21 @@ import cz.jzitnik.game.ui.Inventory;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
 @Getter
 @Setter
-public class Block {
+public class Block implements Serializable {
     private String blockId;
     private SpriteLoader.SPRITES sprite;
-    private Optional<Enum> spriteState = Optional.empty();
+    private MyOptional<Enum> spriteState = MyOptional.empty();
     private boolean ghost = false;
     private boolean isMineable = true;
     private int hardness = 1;
-    private Optional<ItemType> tool = Optional.empty();
+    private MyOptional<ItemType> tool = MyOptional.empty();
     private List<ToolVariant> toolVariants = new ArrayList<>();
     private List<Item> drops = new ArrayList<>();
     private Object data = null;
@@ -52,7 +53,7 @@ public class Block {
         this.blockId = blockId;
         this.sprite = sprite;
         this.hardness = hardness;
-        this.tool = Optional.of(tool);
+        this.tool = MyOptional.of(tool);
         this.toolVariants = toolVariants;
     }
 
@@ -61,13 +62,13 @@ public class Block {
         this.blockId = blockId;
         this.sprite = sprite;
         this.hardness = hardness;
-        this.tool = Optional.of(tool);
+        this.tool = MyOptional.of(tool);
         this.toolVariants = toolVariants;
         this.data = data;
     }
 
     public void setSpriteState(Enum spriteState) {
-        this.spriteState = Optional.of(spriteState);
+        this.spriteState = MyOptional.of(spriteState);
     }
 
     public double calculateHardness(Inventory inventory) {
diff --git a/src/main/java/cz/jzitnik/game/entities/Dependencies.java b/src/main/java/cz/jzitnik/game/entities/Dependencies.java
index 896063c..8839f1a 100644
--- a/src/main/java/cz/jzitnik/game/entities/Dependencies.java
+++ b/src/main/java/cz/jzitnik/game/entities/Dependencies.java
@@ -1,5 +1,6 @@
 package cz.jzitnik.game.entities;
 
+import cz.jzitnik.game.GameSaver;
 import cz.jzitnik.game.handlers.pickup.PickupHandlerProvider;
 import cz.jzitnik.game.handlers.place.PlaceHandler;
 import cz.jzitnik.game.mobs.EntityHurtAnimation;
@@ -10,4 +11,5 @@ public class Dependencies {
     public EntityHurtAnimation entityHurtAnimation = new EntityHurtAnimation();
     public EntityKill entityKill = new EntityKill();
     public PickupHandlerProvider pickupHandlerProvider = new PickupHandlerProvider();
+    public GameSaver gameSaver = new GameSaver();
 }
diff --git a/src/main/java/cz/jzitnik/game/entities/MyOptional.java b/src/main/java/cz/jzitnik/game/entities/MyOptional.java
new file mode 100644
index 0000000..3f74c8b
--- /dev/null
+++ b/src/main/java/cz/jzitnik/game/entities/MyOptional.java
@@ -0,0 +1,115 @@
+package cz.jzitnik.game.entities;
+
+import java.io.*;
+import java.util.NoSuchElementException;
+import java.util.function.*;
+
+public class MyOptional<T> implements Serializable {
+    private static final long serialVersionUID = 1L;
+    private T value;
+    private boolean isPresent;
+
+    // Constructor
+    public MyOptional() {
+        this.isPresent = false;
+    }
+
+    public MyOptional(T value) {
+        this.value = value;
+        this.isPresent = true;
+    }
+
+    // Check if value is present
+    public boolean isPresent() {
+        return isPresent;
+    }
+
+    // Get the value (or throw exception if not present)
+    public T get() {
+        if (!isPresent) {
+            throw new NoSuchElementException("No value present");
+        }
+        return value;
+    }
+
+    // Get the value or return default
+    public T orElse(T other) {
+        return isPresent ? value : other;
+    }
+
+    // If value is present, apply function, else return another Optional
+    public <U> MyOptional<U> map(Function<? super T, ? extends U> mapper) {
+        if (!isPresent) {
+            return new MyOptional<>();
+        }
+        return new MyOptional<>(mapper.apply(value));
+    }
+
+    // If value is present, apply function and return a new Optional
+    public <U> MyOptional<U> flatMap(Function<? super T, ? extends MyOptional<U>> mapper) {
+        if (!isPresent) {
+            return new MyOptional<>();
+        }
+        return mapper.apply(value);
+    }
+
+    // Perform an action if value is present
+    public void ifPresent(Consumer<? super T> action) {
+        if (isPresent) {
+            action.accept(value);
+        }
+    }
+
+    // Return the value inside the Optional or default if not present
+    public T orElseGet(Supplier<? extends T> other) {
+        return isPresent ? value : other.get();
+    }
+
+    // Filter the value based on a condition
+    public MyOptional<T> filter(Predicate<? super T> predicate) {
+        if (!isPresent || !predicate.test(value)) {
+            return new MyOptional<>();
+        }
+        return this;
+    }
+
+    // Serialize the value
+    private void writeObject(ObjectOutputStream out) throws IOException {
+        out.writeBoolean(isPresent);
+        if (isPresent) {
+            out.writeObject(value);
+        }
+    }
+
+    // Deserialize the value
+    private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
+        isPresent = in.readBoolean();
+        if (isPresent) {
+            value = (T) in.readObject();
+        }
+    }
+
+    @Override
+    public String toString() {
+        return isPresent ? "SerializableOptional[" + value + "]" : "SerializableOptional.empty";
+    }
+
+    // Static factory method for an empty SerializableOptional
+    public static <T> MyOptional<T> empty() {
+        return new MyOptional<>();
+    }
+
+    // Static factory method for a present value
+    public static <T> MyOptional<T> of(T value) {
+        return new MyOptional<>(value);
+    }
+
+    // Static factory method for a present value or null
+    public static <T> MyOptional<T> ofNullable(T value) {
+        return value == null ? empty() : new MyOptional<>(value);
+    }
+
+    public boolean isEmpty() {
+        return !isPresent;
+    }
+}
\ No newline at end of file
diff --git a/src/main/java/cz/jzitnik/game/entities/Player.java b/src/main/java/cz/jzitnik/game/entities/Player.java
index 5a61710..c24d5b9 100644
--- a/src/main/java/cz/jzitnik/game/entities/Player.java
+++ b/src/main/java/cz/jzitnik/game/entities/Player.java
@@ -3,9 +3,11 @@ package cz.jzitnik.game.entities;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
+
 @Getter
 @Setter
-public class Player {
+public class Player implements Serializable {
     private int health = 10;
     private int hunger = 10;
     private int fallDistance = 0;
diff --git a/src/main/java/cz/jzitnik/game/entities/items/InventoryItem.java b/src/main/java/cz/jzitnik/game/entities/items/InventoryItem.java
index 44d59fa..7198ecc 100644
--- a/src/main/java/cz/jzitnik/game/entities/items/InventoryItem.java
+++ b/src/main/java/cz/jzitnik/game/entities/items/InventoryItem.java
@@ -3,12 +3,14 @@ package cz.jzitnik.game.entities.items;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 
+import java.io.Serializable;
+import java.lang.foreign.SegmentAllocator;
 import java.util.ArrayList;
 import java.util.List;
 
 @Getter
 @AllArgsConstructor
-public class InventoryItem {
+public class InventoryItem implements Serializable {
     private int amount;
     private final List<Item> item;
 
diff --git a/src/main/java/cz/jzitnik/game/entities/items/Item.java b/src/main/java/cz/jzitnik/game/entities/items/Item.java
index 514067c..d8c9ec9 100644
--- a/src/main/java/cz/jzitnik/game/entities/items/Item.java
+++ b/src/main/java/cz/jzitnik/game/entities/items/Item.java
@@ -2,29 +2,31 @@ package cz.jzitnik.game.entities.items;
 
 import cz.jzitnik.game.entities.Block;
 import cz.jzitnik.game.SpriteLoader;
+import cz.jzitnik.game.entities.MyOptional;
 import lombok.AllArgsConstructor;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
 import java.util.Optional;
 
 @Getter
 @Setter
 @AllArgsConstructor
-public class Item {
+public class Item implements Serializable {
     private String id;
     private String name;
     private ItemType type;
-    private Optional<ToolVariant> toolVariant = Optional.empty();
+    private MyOptional<ToolVariant> toolVariant = MyOptional.empty();
     private SpriteLoader.SPRITES sprite;
-    private Optional<Enum> spriteState = Optional.empty();
+    private MyOptional<Enum> spriteState = MyOptional.empty();
     private boolean stackable = true;
     private int durability;
     private double miningDecrease = 0;
     private int stackAmount = 64;
     private int addHunger = 0;
     private int dealDamage = 1;
-    private Optional<Block> block = Optional.empty();
+    private MyOptional<Block> block = MyOptional.empty();
 
     public Item(String id, String name, ItemType type, SpriteLoader.SPRITES sprite, ToolVariant toolVariant,
             int durability, boolean stackable, int dealDamage) {
@@ -32,7 +34,7 @@ public class Item {
         this.name = name;
         this.type = type;
         this.sprite = sprite;
-        this.toolVariant = Optional.of(toolVariant);
+        this.toolVariant = MyOptional.of(toolVariant);
         this.durability = durability;
         this.stackable = stackable;
         this.dealDamage = dealDamage;
@@ -44,7 +46,7 @@ public class Item {
         this.name = name;
         this.type = type;
         this.sprite = sprite;
-        this.toolVariant = Optional.of(toolVariant);
+        this.toolVariant = MyOptional.of(toolVariant);
         this.miningDecrease = miningDecrease;
         this.durability = durability;
         this.stackable = stackable;
@@ -55,7 +57,7 @@ public class Item {
         this.name = name;
         this.type = type;
         this.sprite = sprite;
-        this.block = Optional.of(block);
+        this.block = MyOptional.of(block);
     }
 
     public Item(String id, String name, ItemType type, SpriteLoader.SPRITES sprite) {
@@ -89,6 +91,6 @@ public class Item {
     }
 
     public void setSpriteState(Enum spriteState) {
-        this.spriteState = Optional.of(spriteState);
+        this.spriteState = MyOptional.of(spriteState);
     }
 }
diff --git a/src/main/java/cz/jzitnik/game/entities/items/ItemBlockSupplier.java b/src/main/java/cz/jzitnik/game/entities/items/ItemBlockSupplier.java
index 54214b7..b20fbe7 100644
--- a/src/main/java/cz/jzitnik/game/entities/items/ItemBlockSupplier.java
+++ b/src/main/java/cz/jzitnik/game/entities/items/ItemBlockSupplier.java
@@ -4,6 +4,7 @@ import cz.jzitnik.game.annotations.BlockRegistry;
 import cz.jzitnik.game.annotations.EntityRegistry;
 import cz.jzitnik.game.annotations.ItemRegistry;
 import cz.jzitnik.game.entities.Block;
+import cz.jzitnik.game.entities.MyOptional;
 import org.reflections.Reflections;
 
 import java.lang.reflect.Constructor;
@@ -107,7 +108,7 @@ public class ItemBlockSupplier {
         try {
             Item item = registeredItems.get(key).newInstance();
             if (registeredBlocks.containsKey(blockList.get(key))) {
-                item.setBlock(Optional.of(getBlock(blockList.get(key), item)));
+                item.setBlock(MyOptional.of(getBlock(blockList.get(key), item)));
             }
 
             return item;
@@ -121,9 +122,9 @@ public class ItemBlockSupplier {
             Item item = registeredItems.get(key).newInstance();
 
             if (blockList.get(key).equals(block.getBlockId())) {
-                item.setBlock(Optional.of(block));
+                item.setBlock(MyOptional.of(block));
             } else {
-                item.setBlock(Optional.of(getBlock(blockList.get(key), item)));
+                item.setBlock(MyOptional.of(getBlock(blockList.get(key), item)));
             }
 
             return item;
diff --git a/src/main/java/cz/jzitnik/game/logic/services/flowing/FlowingData.java b/src/main/java/cz/jzitnik/game/logic/services/flowing/FlowingData.java
index 4056f4a..ef5af50 100644
--- a/src/main/java/cz/jzitnik/game/logic/services/flowing/FlowingData.java
+++ b/src/main/java/cz/jzitnik/game/logic/services/flowing/FlowingData.java
@@ -3,8 +3,10 @@ package cz.jzitnik.game.logic.services.flowing;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
+
 @Getter
 @Setter
-public class FlowingData {
+public class FlowingData implements Serializable {
     protected boolean isSource = true;
 }
diff --git a/src/main/java/cz/jzitnik/game/logic/services/saplings/SaplingData.java b/src/main/java/cz/jzitnik/game/logic/services/saplings/SaplingData.java
index 31ab442..871ad51 100644
--- a/src/main/java/cz/jzitnik/game/logic/services/saplings/SaplingData.java
+++ b/src/main/java/cz/jzitnik/game/logic/services/saplings/SaplingData.java
@@ -3,11 +3,12 @@ package cz.jzitnik.game.logic.services.saplings;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
 import java.util.Random;
 
 @Getter
 @Setter
-public class SaplingData {
+public class SaplingData implements Serializable {
     private int growWait;
 
     public SaplingData() {
diff --git a/src/main/java/cz/jzitnik/game/mobs/services/cow/CowData.java b/src/main/java/cz/jzitnik/game/mobs/services/cow/CowData.java
index 37db14f..4a41d8b 100644
--- a/src/main/java/cz/jzitnik/game/mobs/services/cow/CowData.java
+++ b/src/main/java/cz/jzitnik/game/mobs/services/cow/CowData.java
@@ -3,9 +3,11 @@ package cz.jzitnik.game.mobs.services.cow;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
+
 @Getter
 @Setter
-public class CowData {
+public class CowData implements Serializable {
     private int lastDirection = 1; // 1 = right, -1 = left
     private int movementCooldown = 0;
     private int jumpAttempts = 0;
diff --git a/src/main/java/cz/jzitnik/game/mobs/services/pig/PigData.java b/src/main/java/cz/jzitnik/game/mobs/services/pig/PigData.java
index 8f95ab7..e611fa6 100644
--- a/src/main/java/cz/jzitnik/game/mobs/services/pig/PigData.java
+++ b/src/main/java/cz/jzitnik/game/mobs/services/pig/PigData.java
@@ -3,9 +3,11 @@ package cz.jzitnik.game.mobs.services.pig;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
+
 @Getter
 @Setter
-public class PigData {
+public class PigData implements Serializable {
     private int lastDirection = 1; // 1 = right, -1 = left
     private int movementCooldown = 0;
     private int jumpAttempts = 0;
diff --git a/src/main/java/cz/jzitnik/game/mobs/services/sheep/SheepData.java b/src/main/java/cz/jzitnik/game/mobs/services/sheep/SheepData.java
index ab3e4bf..4caa046 100644
--- a/src/main/java/cz/jzitnik/game/mobs/services/sheep/SheepData.java
+++ b/src/main/java/cz/jzitnik/game/mobs/services/sheep/SheepData.java
@@ -3,9 +3,11 @@ package cz.jzitnik.game.mobs.services.sheep;
 import lombok.Getter;
 import lombok.Setter;
 
+import java.io.Serializable;
+
 @Getter
 @Setter
-public class SheepData {
+public class SheepData implements Serializable {
     private int lastDirection = 1; // 1 = right, -1 = left
     private int movementCooldown = 0;
     private int jumpAttempts = 0;
diff --git a/src/main/java/cz/jzitnik/game/threads/InputHandlerThread.java b/src/main/java/cz/jzitnik/game/threads/InputHandlerThread.java
index d757012..6647246 100644
--- a/src/main/java/cz/jzitnik/game/threads/InputHandlerThread.java
+++ b/src/main/java/cz/jzitnik/game/threads/InputHandlerThread.java
@@ -84,6 +84,8 @@ public class InputHandlerThread extends Thread {
                     case 'q' -> {
                         System.out.println("Exiting game...");
                         isRunning[0] = false;
+                        game.getGameStates().dependencies.gameSaver.save(game);
+                        System.exit(0);
                     }
                     default -> {
                     }
diff --git a/src/main/java/cz/jzitnik/game/ui/Inventory.java b/src/main/java/cz/jzitnik/game/ui/Inventory.java
index 7679c43..f59a599 100644
--- a/src/main/java/cz/jzitnik/game/ui/Inventory.java
+++ b/src/main/java/cz/jzitnik/game/ui/Inventory.java
@@ -9,19 +9,28 @@ import lombok.Getter;
 import lombok.Setter;
 import org.jline.terminal.Terminal;
 
+import java.io.Serial;
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Optional;
 
 @Getter
-public class Inventory {
+public class Inventory implements Serializable {
     public static final int INVENTORY_SIZE_PX = 470;
     public static final int COLUMN_AMOUNT = 5;
     public static final int ROW_AMOUNT = 4;
 
     private final InventoryItem[] items = new InventoryItem[20];
     private final InventoryItem[] hotbar = new InventoryItem[9];
-    private final SmallCraftingTable smallCraftingTable = new SmallCraftingTable(this);
+    private transient SmallCraftingTable smallCraftingTable = new SmallCraftingTable(this);
+
+    @Serial
+    private void readObject(java.io.ObjectInputStream in) throws java.io.IOException, ClassNotFoundException {
+        in.defaultReadObject();
+
+        smallCraftingTable = new SmallCraftingTable(this);
+    }
 
     @Setter
     private int itemInhHandIndex = 0;