diff --git a/src/de/miaurizius/jgame2d/core/handlers/Sound.java b/src/de/miaurizius/jgame2d/core/handlers/Sound.java
index 141fdf8..4eb38e4 100644
--- a/src/de/miaurizius/jgame2d/core/handlers/Sound.java
+++ b/src/de/miaurizius/jgame2d/core/handlers/Sound.java
@@ -22,6 +22,8 @@ public class Sound {
             soundURL[2] = new File("assets/sounds/powerup.wav").toURI().toURL();
             soundURL[3] = new File("assets/sounds/unlock.wav").toURI().toURL();
             soundURL[4] = new File("assets/sounds/fanfare.wav").toURI().toURL();
+            soundURL[5] = new File("assets/sounds/hitmonster.wav").toURI().toURL();
+            soundURL[6] = new File("assets/sounds/receivedamage.wav").toURI().toURL();
         } catch(MalformedURLException e) {
             Boot.logger.log(Level.SEVERE, e.getMessage());
         }
diff --git a/src/de/miaurizius/jgame2d/entity/Entity.java b/src/de/miaurizius/jgame2d/entity/Entity.java
index c85b0cc..03dba40 100644
--- a/src/de/miaurizius/jgame2d/entity/Entity.java
+++ b/src/de/miaurizius/jgame2d/entity/Entity.java
@@ -82,6 +82,14 @@ public class Entity {
             else spriteNum = 0;
             spriteCounter = 0;
         }
+
+        // INVINCIBLE COUNTER
+        if(!invincible) return;
+        invincibleCount++;
+        if(invincibleCount > 40) {
+            invincible = false;
+            invincibleCount = 0;
+        }
     }
     public void draw(Graphics2D graphics2d) {
         int screenX = worldX - panel.player.worldX + panel.player.screenX;
@@ -92,7 +100,19 @@ public class Entity {
                 worldY + panel.tileSize > panel.player.worldY - panel.player.screenY &&
                 worldY - panel.tileSize < panel.player.worldY + panel.player.screenY
         ) {
-            graphics2d.drawImage(parseSprite(), screenX, screenY, panel.tileSize, panel.tileSize, null);
+            if(invincible) {
+                graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.4f));
+            }
+
+            // only modify sprite render position for player because I dont know yet how monster attack sprite are gonna look
+            if(type == EntityType.PLAYER) {
+                if(attacking) graphics2d.drawImage(parseSpriteATK(),
+                        (direction == Direction.LEFT) ? screenX - panel.tileSize : screenX,
+                        (direction == Direction.UP) ? screenY - panel.tileSize : screenY, null);
+                else graphics2d.drawImage(parseSprite(), screenX, screenY, null);
+            } else graphics2d.drawImage(parseSprite(), screenX, screenY, null);
+
+            graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));
         }
     }
 
diff --git a/src/de/miaurizius/jgame2d/entity/OldManNPC.java b/src/de/miaurizius/jgame2d/entity/OldManNPC.java
index 7f25ead..98fd566 100644
--- a/src/de/miaurizius/jgame2d/entity/OldManNPC.java
+++ b/src/de/miaurizius/jgame2d/entity/OldManNPC.java
@@ -2,6 +2,7 @@ package de.miaurizius.jgame2d.entity;
 
 import de.miaurizius.jgame2d.core.enums.Direction;
 import de.miaurizius.jgame2d.core.GamePanel;
+import de.miaurizius.jgame2d.core.enums.EntityType;
 
 import java.util.Random;
 
@@ -9,6 +10,7 @@ public class OldManNPC extends Entity {
 
     public OldManNPC(GamePanel panel) {
         super(panel);
+        type = EntityType.NPC;
         name = "oldman-npc";
 
         direction = Direction.DOWN;
diff --git a/src/de/miaurizius/jgame2d/entity/Player.java b/src/de/miaurizius/jgame2d/entity/Player.java
index b558015..aeb7e93 100644
--- a/src/de/miaurizius/jgame2d/entity/Player.java
+++ b/src/de/miaurizius/jgame2d/entity/Player.java
@@ -2,6 +2,7 @@ package de.miaurizius.jgame2d.entity;
 
 import de.miaurizius.jgame2d.core.*;
 import de.miaurizius.jgame2d.core.enums.Direction;
+import de.miaurizius.jgame2d.core.enums.EntityType;
 import de.miaurizius.jgame2d.core.enums.GameState;
 import de.miaurizius.jgame2d.core.handlers.KeyHandler;
 
@@ -17,7 +18,9 @@ public class Player extends Entity {
     public Player(GamePanel panel, KeyHandler keyH) {
         super(panel);
         this.keyH = keyH;
+
         name = "player";
+        type = EntityType.PLAYER;
 
         screenX = panel.screenWidth/2 - panel.tileSize/2;
         screenY = panel.screenHeight/2 - panel.tileSize/2;
@@ -91,6 +94,8 @@ public class Player extends Entity {
                 spriteCounter = 0;
             }
         }
+
+        // INVINCIBLE COUNTER
         if(!invincible) return;
         invincibleCount++;
         if(invincibleCount > 60) {
@@ -98,21 +103,6 @@ public class Player extends Entity {
             invincibleCount = 0;
         }
     }
-    public void draw(Graphics2D graphics2d) {
-        int screenX = worldX - panel.player.worldX + panel.player.screenX;
-        int screenY = worldY - panel.player.worldY + panel.player.screenY;
-
-        if(invincible) {
-            graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.3f));
-        }
-
-        if(attacking) graphics2d.drawImage(parseSpriteATK(),
-                (direction == Direction.LEFT) ? screenX - panel.tileSize : screenX,
-                (direction == Direction.UP) ? screenY - panel.tileSize : screenY, null);
-        else graphics2d.drawImage(parseSprite(), screenX, screenY, null);
-
-        graphics2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 1f));
-    }
 
     // INTERACTION
     public void pickObject(int index) {
@@ -123,6 +113,7 @@ public class Player extends Entity {
         if(index == 999) return;
         if(invincible) return;
         life -= 1;
+        panel.playSE(6);
         invincible = true;
     }
     public void attacking() {
@@ -161,6 +152,11 @@ public class Player extends Entity {
     }
     public void damageMonster(int index) {
         if(index == 999) return;
+        if(panel.monster[index].invincible) return;
+        panel.monster[index].life -= 1;
+        panel.playSE(5);
+        panel.monster[index].invincible = true;
+        if(panel.monster[index].life <= 0) panel.monster[index] = null;
     }
 
     public void interactNPC(int index) {