diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 199f105..c178e5b 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -10,7 +10,8 @@
         android:supportsRtl="true"
         android:theme="@style/Theme.MemoCards">
         <activity android:name=".Leaderboards"></activity>
-        <activity android:name=".Achievements" />
+        <activity android:name=".Achievements"
+            android:parentActivityName=".MainActivity"/>
         <activity android:name=".Settings" />
         <activity android:name=".Game" />
         <activity android:name=".Levels" />
diff --git a/app/src/main/java/com/example/memocards/Achievements.java b/app/src/main/java/com/example/memocards/Achievements.java
index d1810a7..ae88e4c 100644
--- a/app/src/main/java/com/example/memocards/Achievements.java
+++ b/app/src/main/java/com/example/memocards/Achievements.java
@@ -2,13 +2,31 @@
 
 import androidx.appcompat.app.AppCompatActivity;
 
+import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.Button;
 
 public class Achievements extends AppCompatActivity {
 
+    private Button backButton;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_achievements);
+
+        this.backButton = this.findViewById(R.id.back_button);
+
+        // When user click "Back" button.
+        this.backButton.setOnClickListener(new View.OnClickListener() {
+
+            @Override
+            public void onClick(View view) {
+                // Back to main Activity.
+                Intent intent = new Intent (Achievements.this, MainActivity.class );
+                startActivity(intent);
+            }
+        });
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/memocards/MainActivity.java b/app/src/main/java/com/example/memocards/MainActivity.java
index 7cc3d16..cecf335 100644
--- a/app/src/main/java/com/example/memocards/MainActivity.java
+++ b/app/src/main/java/com/example/memocards/MainActivity.java
@@ -10,6 +10,7 @@
 public class MainActivity extends AppCompatActivity{
 
     private Button play;
+    private Button achievments;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -24,6 +25,15 @@ public void onClick(View v) {
             }
         });
 
+        achievments = findViewById(R.id.achievements);
+        achievments.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intent = new Intent(MainActivity.this, Achievements.class);
+                startActivity(intent);
+            }
+        });
+
 
     }
 
diff --git a/app/src/main/res/layout/activity_achievements.xml b/app/src/main/res/layout/activity_achievements.xml
index 4660f4a..074057a 100644
--- a/app/src/main/res/layout/activity_achievements.xml
+++ b/app/src/main/res/layout/activity_achievements.xml
@@ -6,4 +6,14 @@
     android:layout_height="match_parent"
     tools:context=".Achievements">
 
+    <Button
+        android:id="@+id/back_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="664dp"
+        android:text="@string/back"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index b12a779..0b46696 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -33,7 +33,7 @@
             android:text="@string/settings" />
 
         <Button
-            android:id="@+id/achievments"
+            android:id="@+id/achievements"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:padding="20dp"
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index f2a613e..ee57ae6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -9,4 +9,5 @@
     <string name="difficult">Difficult</string>
     <string name="Back">back</string>
     <string name="Home">home</string>
+    <string name="back">BACK</string>
 </resources>
diff --git a/build.gradle b/build.gradle
index c83b596..3fcdbc4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -5,7 +5,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath "com.android.tools.build:gradle:4.1.0"
+        classpath 'com.android.tools.build:gradle:4.1.2'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files
diff --git a/local.properties b/local.properties
index 77dcf93..b5906e2 100644
--- a/local.properties
+++ b/local.properties
@@ -4,5 +4,5 @@
 # Location of the SDK. This is only used by Gradle.
 # For customization when using a Version Control System, please read the
 # header note.
-#Mon Jan 18 10:55:10 CET 2021
-sdk.dir=C\:\\Users\\Des\\AppData\\Local\\Android\\Sdk
+#Wed Jan 27 14:13:30 CET 2021
+sdk.dir=C\:\\Users\\Sharus\\AppData\\Local\\Android\\Sdk