diff --git a/.idea/deploymentTargetDropDown.xml b/.idea/deploymentTargetDropDown.xml
new file mode 100644
index 0000000..039b804
--- /dev/null
+++ b/.idea/deploymentTargetDropDown.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="deploymentTargetDropDown">
+    <runningDeviceTargetSelectedWithDropDown>
+      <Target>
+        <type value="RUNNING_DEVICE_TARGET" />
+        <deviceKey>
+          <Key>
+            <type value="SERIAL_NUMBER" />
+            <value value="d4a74487" />
+          </Key>
+        </deviceKey>
+      </Target>
+    </runningDeviceTargetSelectedWithDropDown>
+    <timeTargetWasSelectedWithDropDown value="2023-03-09T00:48:51.191927300Z" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/app/src/main/java/com/jorgecruces/metrometro/activities/PlayGameActivity.java b/app/src/main/java/com/jorgecruces/metrometro/activities/PlayGameActivity.java
index d81c2c6..5fc9633 100644
--- a/app/src/main/java/com/jorgecruces/metrometro/activities/PlayGameActivity.java
+++ b/app/src/main/java/com/jorgecruces/metrometro/activities/PlayGameActivity.java
@@ -13,6 +13,8 @@
 import android.util.Log;
 import android.util.TypedValue;
 import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
 import android.widget.Button;
 import android.widget.HorizontalScrollView;
 import android.widget.ImageView;
@@ -320,12 +322,20 @@ private void setCurrentAlternativesViews() {
             currentTextView.setText(currentStation.getName());
         }
 
+        Animation scaleAnimation = AnimationUtils.loadAnimation(this,R.anim.scale);
+
+
         // OnClickListener
         for (TextView textView: alternativesTextView) {
             String lineName = textView.getText().toString();
-            textView.setOnClickListener(view -> this.checkAlternative(lineName));
+            textView.setOnClickListener(view -> {
+                view.startAnimation(scaleAnimation);
+                this.checkAlternative(lineName);
+            });
         }
 
+
+
     }
 
     private void setCurrentStationData(int position) {
diff --git a/app/src/main/res/anim/scale.xml b/app/src/main/res/anim/scale.xml
new file mode 100644
index 0000000..ff30162
--- /dev/null
+++ b/app/src/main/res/anim/scale.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+    <scale
+        android:fromXScale="1.0"
+        android:fromYScale="1.0"
+        android:toXScale="0.97"
+        android:toYScale="0.97"
+        android:pivotX="50%"
+        android:pivotY="50%"
+        android:duration="100"
+        android:repeatMode="reverse"
+        android:repeatCount="1">
+    </scale>
+
+</set>
\ 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 fe07728..017ead0 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -16,7 +16,9 @@
         app:layout_constraintHorizontal_bias="0.497"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/logo" />
+        app:srcCompat="@drawable/logo"
+        android:contentDescription="@string/content_description_menu_logo"
+        />
 
     <ImageView
         android:id="@+id/imageViewButtonPlay"
@@ -27,7 +29,9 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/imageViewLogo"
-        app:srcCompat="@drawable/main_menu_button_play" />
+        app:srcCompat="@drawable/main_menu_button_play"
+        android:contentDescription="@string/content_description_button_play"
+        />
 
     <ImageView
         android:id="@+id/imageViewButtonInformation"
@@ -39,7 +43,8 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/imageViewButtonPlay"
         app:srcCompat="@drawable/main_menu_button_information"
-        tools:ignore="UsingOnClickInXml" />
+        android:contentDescription="@string/content_description_button_information"
+        />
 
     <ImageView
         android:id="@+id/imageViewButtonReset"
@@ -52,7 +57,9 @@
         app:layout_constraintEnd_toStartOf="@+id/imageViewButtonConfiguration"
         app:layout_constraintStart_toEndOf="@+id/imageViewButtonInformation"
         app:layout_constraintTop_toBottomOf="@+id/imageViewButtonPlay"
-        app:srcCompat="@drawable/main_menu_button_reset" />
+        app:srcCompat="@drawable/main_menu_button_reset"
+        android:contentDescription="@string/content_description_button_reset"
+        />
 
     <ImageView
         android:id="@+id/imageViewButtonConfiguration"
@@ -64,7 +71,9 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@+id/imageViewButtonReset"
         app:layout_constraintTop_toBottomOf="@+id/imageViewButtonPlay"
-        app:srcCompat="@drawable/main_menu_configuration" />
+        app:srcCompat="@drawable/main_menu_configuration"
+        android:contentDescription="@string/content_description_button_configuration"
+         />
 
     <com.google.android.gms.ads.AdView
         android:id="@+id/adView"
@@ -77,5 +86,5 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        tools:ignore="MissingConstraints"></com.google.android.gms.ads.AdView>
+        tools:ignore="MissingConstraints" />
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_menu_metro.xml b/app/src/main/res/layout/activity_menu_metro.xml
index c846295..23c740f 100644
--- a/app/src/main/res/layout/activity_menu_metro.xml
+++ b/app/src/main/res/layout/activity_menu_metro.xml
@@ -18,7 +18,7 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        tools:ignore="MissingConstraints"></com.google.android.gms.ads.AdView>
+        tools:ignore="MissingConstraints" />
 
     <androidx.recyclerview.widget.RecyclerView
         android:id="@+id/menuMetroRecyclerView"
@@ -28,8 +28,8 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/imageViewLineMenuTitle">
-
+        app:layout_constraintTop_toBottomOf="@+id/imageViewLineMenuTitle"
+        >
     </androidx.recyclerview.widget.RecyclerView>
 
     <TextView
@@ -44,9 +44,9 @@
         android:elevation="3dp"
         android:fontFamily="@font/titiliumweb_bold"
         android:gravity="center_horizontal|center_vertical"
-        android:text="0"
+        android:text="@string/default_value_score_star_view"
         android:textAlignment="center"
-        android:textColor="#000000"
+        android:textColor="#6D4C41"
         android:textSize="34sp"
         android:textStyle="bold"
         app:layout_constraintBottom_toTopOf="@+id/menuMetroRecyclerView"
@@ -62,7 +62,9 @@
         app:layout_constraintEnd_toStartOf="@+id/scoreStarView"
         app:layout_constraintStart_toEndOf="@+id/imageViewButtonBack"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/lines_metro_title" />
+        app:srcCompat="@drawable/lines_metro_title"
+        android:contentDescription="@string/content_description_title_menu"
+        />
 
     <ImageView
         android:id="@+id/imageViewButtonBack"
@@ -75,6 +77,8 @@
         app:layout_constraintEnd_toStartOf="@+id/imageViewLineMenuTitle"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/lines_metro_button_back" />
+        app:srcCompat="@drawable/lines_metro_button_back"
+        android:contentDescription="@string/content_description_go_back_button"
+        />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_metro_information.xml b/app/src/main/res/layout/activity_metro_information.xml
index 9d51a60..95230b0 100644
--- a/app/src/main/res/layout/activity_metro_information.xml
+++ b/app/src/main/res/layout/activity_metro_information.xml
@@ -7,23 +7,12 @@
     android:background="@drawable/lines_metro_background"
     tools:context=".activities.MetroInformationActivity">
 
-    <com.google.android.gms.ads.AdView
-        android:id="@+id/adView3"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:layout_alignParentBottom="true"
-        android:layout_centerHorizontal="true"
-        app:adSize="BANNER"
-        app:adUnitId="ca-app-pub-3940256099942544/6300978111"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintStart_toStartOf="parent"
-        tools:ignore="MissingConstraints"></com.google.android.gms.ads.AdView>
 
     <ScrollView
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
-
+        android:layout_height="match_parent"
+        android:contentDescription="@string/description_metro_information_scroll"
+        >
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
@@ -36,7 +25,7 @@
         android:layout_height="wrap_content"
         android:layout_marginTop="16dp"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Mapa del metro (Se puede hacer Zoom)"
+        android:text="@string/description_metro_information"
         android:textSize="20sp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
@@ -51,7 +40,9 @@
         android:onClick="goToMainActivity"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/lines_metro_button_back" />
+        app:srcCompat="@drawable/lines_metro_button_back"
+        android:contentDescription="@string/content_description_go_back_button"
+        />
 
     <com.jorgecruces.metrometro.customViews.ZoomableImageView
         android:id="@+id/metroMap"
@@ -65,7 +56,10 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/textViewTitle2"
         app:layout_constraintVertical_bias="0.064"
-        app:srcCompat="@drawable/info_metro_image_map" />
+        app:srcCompat="@drawable/info_metro_image_map"
+        tools:ignore="ImageContrastCheck"
+        android:contentDescription="@string/image_metro_santiago"
+        />
 
     <TextView
         android:id="@+id/textViewTitle2"
@@ -77,7 +71,7 @@
         android:background="@drawable/gameplay_background_game_line"
         android:fontFamily="@font/titiliumweb_bold"
         android:gravity="center_horizontal|center_vertical"
-        android:text="Lineas Metro"
+        android:text="@string/metro_lines"
         android:textAlignment="center"
         android:textColor="#FFFFFF"
         android:textSize="34sp"
diff --git a/app/src/main/res/layout/activity_play_game.xml b/app/src/main/res/layout/activity_play_game.xml
index 94cad97..2d9fc68 100644
--- a/app/src/main/res/layout/activity_play_game.xml
+++ b/app/src/main/res/layout/activity_play_game.xml
@@ -18,7 +18,7 @@
         app:adUnitId="ca-app-pub-8814283715092277/7449171029"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"></com.google.android.gms.ads.AdView>
+        app:layout_constraintTop_toTopOf="parent" />
 
 
     <ImageView
@@ -27,7 +27,7 @@
         android:layout_height="61dp"
         android:layout_marginStart="16dp"
         android:layout_marginTop="54dp"
-        android:contentDescription="Button"
+        android:contentDescription="@string/content_description_go_back_button"
         android:onClick="goBackToMenu"
         app:layout_constraintEnd_toStartOf="@+id/textViewTitle"
         app:layout_constraintStart_toStartOf="parent"
@@ -43,7 +43,7 @@
         android:background="@drawable/gameplay_background_game_line"
         android:fontFamily="@font/titiliumweb_bold"
         android:gravity="center_horizontal|center_vertical"
-        android:text="Lineas Metro"
+        android:text="@string/metro_lines"
         android:textAlignment="center"
         android:textColor="#FFFFFF"
         android:textSize="34sp"
@@ -61,7 +61,7 @@
         android:background="@drawable/gameplay_button_metro_station"
         android:fontFamily="@font/titiliumweb_regular"
         android:gravity="center_horizontal|center_vertical"
-        android:text="SAN PEDRO"
+        android:text="@string/alternative2"
         android:textSize="20sp"
         app:layout_constraintBottom_toTopOf="@+id/textViewAlternative3"
         app:layout_constraintEnd_toStartOf="@+id/textViewAlternative1"
@@ -77,7 +77,7 @@
         android:background="@drawable/gameplay_button_metro_station"
         android:fontFamily="@font/titiliumweb_regular"
         android:gravity="center_horizontal|center_vertical"
-        android:text="SAN PEDRO"
+        android:text="@string/alternative1"
         android:textSize="20sp"
         app:layout_constraintBottom_toTopOf="@+id/textViewAlternative4"
         app:layout_constraintEnd_toEndOf="parent"
@@ -93,7 +93,7 @@
         android:background="@drawable/gameplay_button_metro_station"
         android:fontFamily="@font/titiliumweb_regular"
         android:gravity="center_horizontal|center_vertical"
-        android:text="SAN PEDRO"
+        android:text="@string/alternative4"
         android:textSize="20sp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
@@ -109,7 +109,7 @@
         android:background="@drawable/gameplay_button_metro_station"
         android:fontFamily="@font/titiliumweb_regular"
         android:gravity="center_horizontal|center_vertical"
-        android:text="SAN PEDRO"
+        android:text="@string/alternative3"
         android:textSize="20sp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/textViewAlternative4"
@@ -134,7 +134,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:fontFamily="@font/titiliumweb_bold"
-            android:text="0"
+            android:text="@string/default_value_current_number_question"
             android:textSize="30sp" />
 
         <TextView
@@ -142,15 +142,16 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:fontFamily="@font/titiliumweb_bold"
-            android:text="/"
-            android:textSize="30sp" />
+            android:text="@string/separator_current_number_question"
+            android:textSize="30sp"
+            tools:ignore="TextContrastCheck" />
 
         <TextView
             android:id="@+id/textViewMaxPosition"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:fontFamily="@font/titiliumweb_bold"
-            android:text="20"
+            android:text="@string/default_max_number_current_number_question"
             android:textSize="30sp" />
     </LinearLayout>
 
@@ -167,7 +168,9 @@
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/textViewTitle">
+        app:layout_constraintTop_toBottomOf="@+id/textViewTitle"
+        android:contentDescription="@string/description_scroll_view_gameplay"
+        >
 
         <LinearLayout
             android:layout_width="wrap_content"
diff --git a/app/src/main/res/layout/configuration_dialog.xml b/app/src/main/res/layout/configuration_dialog.xml
index 6c07eeb..9ba73d3 100644
--- a/app/src/main/res/layout/configuration_dialog.xml
+++ b/app/src/main/res/layout/configuration_dialog.xml
@@ -15,7 +15,7 @@
         android:layout_marginTop="32dp"
         android:fontFamily="@font/titiliumweb_bold"
         android:padding="20dp"
-        android:text="Configuración"
+        android:text="@string/configuration_title"
         android:textAlignment="center"
         android:textColor="#000000"
         android:textSize="34sp"
@@ -32,13 +32,14 @@
         android:layout_marginTop="8dp"
         android:layout_marginBottom="16dp"
         android:fontFamily="@font/titiliumweb_regular"
-        android:text="Musica"
+        android:text="@string/configuration_music"
         android:textSize="30sp"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.517"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/switchSoundConfiguration" />
+        app:layout_constraintTop_toBottomOf="@+id/switchSoundConfiguration"
+        tools:ignore="UseSwitchCompatOrMaterialXml" />
 
     <Switch
         android:id="@+id/switchSoundConfiguration"
@@ -46,12 +47,13 @@
         android:layout_height="75dp"
         android:layout_marginTop="8dp"
         android:fontFamily="@font/titiliumweb_regular"
-        android:text="Sonido"
+        android:text="@string/configuration_sound"
         android:textSize="30sp"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.505"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/lostTextView" />
+        app:layout_constraintTop_toBottomOf="@+id/lostTextView"
+        tools:ignore="UseSwitchCompatOrMaterialXml" />
 
     <ImageView
         android:id="@+id/goBackButtonConfiguration"
@@ -64,6 +66,8 @@
         app:layout_constraintHorizontal_bias="0.0"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/lines_metro_button_back" />
+        app:srcCompat="@drawable/lines_metro_button_back"
+        android:contentDescription="@string/content_description_go_back_button"
+        />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/confirmation_reset_dialog.xml b/app/src/main/res/layout/confirmation_reset_dialog.xml
index 1da3578..c3c1006 100644
--- a/app/src/main/res/layout/confirmation_reset_dialog.xml
+++ b/app/src/main/res/layout/confirmation_reset_dialog.xml
@@ -13,15 +13,15 @@
         android:layout_height="wrap_content"
         android:fontFamily="@font/titiliumweb_bold"
         android:padding="20dp"
-        android:text="¿Estas seguro que quieres reiniciar? (Perderas todo tu progreso)"
+        android:text="@string/reset_question"
         android:textAlignment="center"
         android:textColor="#000000"
         android:textSize="24sp"
         android:textStyle="bold"
-        app:layout_constraintBottom_toTopOf="@+id/imageViewConfirmationDialog"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="parent" />
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
     <Button
         android:id="@+id/buttonResetConfirmationDialog"
@@ -31,7 +31,7 @@
         android:layout_marginBottom="4dp"
         android:backgroundTint="#FF0000"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Reiniciar"
+        android:text="@string/reset_button_reset"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@+id/buttonGoBackConfirmationDialog" />
@@ -44,7 +44,7 @@
         android:layout_marginBottom="4dp"
         android:backgroundTint="#6F1AFF00"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Volver"
+        android:text="@string/reset_button_go_back"
         android:textColor="#000000"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/buttonResetConfirmationDialog"
@@ -61,6 +61,8 @@
         app:layout_constraintEnd_toStartOf="@+id/buttonResetConfirmationDialog"
         app:layout_constraintStart_toEndOf="@+id/buttonGoBackConfirmationDialog"
         app:layout_constraintTop_toBottomOf="@+id/lostTextView"
-        app:srcCompat="@drawable/confirmation_dialog" />
+        app:srcCompat="@drawable/confirmation_dialog"
+        android:contentDescription="@string/content_description_reset_alert"
+        />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/lost_dialog.xml b/app/src/main/res/layout/lost_dialog.xml
index 04a0922..9c42b00 100644
--- a/app/src/main/res/layout/lost_dialog.xml
+++ b/app/src/main/res/layout/lost_dialog.xml
@@ -14,7 +14,7 @@
         android:layout_marginTop="8dp"
         android:fontFamily="@font/titiliumweb_bold"
         android:padding="20dp"
-        android:text="¡Acabas de perder! :("
+        android:text="@string/lost_dialog_title"
         android:textAlignment="center"
         android:textColor="#000000"
         android:textSize="24sp"
@@ -33,7 +33,9 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toStartOf="@+id/imageViewAds"
         app:layout_constraintStart_toStartOf="parent"
-        app:srcCompat="@drawable/main_menu_button_reset" />
+        app:srcCompat="@drawable/main_menu_button_reset"
+        android:contentDescription="@string/lost_dialog_reset_level_button"
+        />
 
     <ImageView
         android:id="@+id/imageViewAds"
@@ -45,7 +47,9 @@
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toEndOf="@+id/imageViewResetLevel"
-        app:srcCompat="@drawable/gameplay_button_ad" />
+        app:srcCompat="@drawable/gameplay_button_ad"
+        android:contentDescription="@string/reset_dialog_ads_button"
+        />
 
     <TextView
         android:id="@+id/textView6"
@@ -54,7 +58,7 @@
         android:layout_marginTop="100dp"
         android:layout_marginEnd="8dp"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Continuar"
+        android:text="@string/lost_dialog_continue"
         android:textColor="#000000"
         android:textSize="20sp"
         app:layout_constraintBottom_toTopOf="@+id/imageViewAds"
@@ -68,7 +72,7 @@
         android:layout_height="wrap_content"
         android:layout_marginTop="100dp"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Reiniciar nivel"
+        android:text="@string/lost_dialog_reset_level"
         android:textColor="#000000"
         android:textSize="20sp"
         app:layout_constraintBottom_toTopOf="@+id/imageViewResetLevel"
diff --git a/app/src/main/res/layout/menu_row.xml b/app/src/main/res/layout/menu_row.xml
index 9c7a72c..7ae9391 100644
--- a/app/src/main/res/layout/menu_row.xml
+++ b/app/src/main/res/layout/menu_row.xml
@@ -30,12 +30,13 @@
 
             <ImageView
                 android:id="@+id/backgroundMetroMenu"
-                android:layout_width="300px"
-                android:layout_height="300px"
+                android:layout_width="300dp"
+                android:layout_height="300dp"
                 android:layout_centerInParent="true"
                 android:layout_marginEnd="10dp"
-                android:layout_weight="1"
-                app:srcCompat="@drawable/metro_svg" />
+                app:srcCompat="@drawable/metro_svg"
+                android:contentDescription="@string/menu_row_metro_color"
+                />
 
             <ImageView
                 android:id="@+id/imageView5"
@@ -43,8 +44,9 @@
                 android:layout_height="78dp"
                 android:layout_centerInParent="true"
                 android:layout_marginEnd="10dp"
-                android:layout_weight="1"
-                app:srcCompat="@drawable/ic_baseline_circle_24" />
+                app:srcCompat="@drawable/ic_baseline_circle_24"
+                android:contentDescription="@string/menu_row_background_color"
+                />
 
         </RelativeLayout>
 
@@ -53,7 +55,7 @@
             android:layout_width="wrap_content"
             android:layout_height="46dp"
             android:fontFamily="@font/titiliumweb_bold"
-            android:text="Linea 1"
+            android:text="@string/menu_row_default_value"
             android:textColor="#2C0453"
             android:textSize="34sp"
             app:layout_constraintBottom_toBottomOf="parent"
@@ -71,7 +73,9 @@
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintTop_toTopOf="parent"
             app:srcCompat="@drawable/lines_metro_star"
-            app:tint="#939393" />
+            app:tint="#939393"
+            android:contentDescription="@string/menu_row_star_description"
+            />
     </androidx.constraintlayout.widget.ConstraintLayout>
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/station_layout.xml b/app/src/main/res/layout/station_layout.xml
index 441cd26..f027b52 100644
--- a/app/src/main/res/layout/station_layout.xml
+++ b/app/src/main/res/layout/station_layout.xml
@@ -19,7 +19,9 @@
             android:layout_width="120dp"
             android:layout_height="120dp"
             android:layout_marginStart="-10dp"
-            app:srcCompat="@drawable/metro_svg" />
+            app:srcCompat="@drawable/metro_svg"
+            android:contentDescription="@string/station_layout_background_metro_color"
+            />
 
         <ImageView
             android:id="@+id/imageView9"
@@ -29,7 +31,9 @@
             android:layout_centerVertical="true"
             android:layout_marginStart="10dp"
             app:srcCompat="@drawable/ic_baseline_circle_24"
-            tools:layout_centerVertical="true" />
+            tools:layout_centerVertical="true"
+            android:contentDescription="@string/station_layout_white_color"
+            />
 
         <ImageView
             android:id="@+id/imageViewForegroundStation"
@@ -42,7 +46,9 @@
             android:layout_toEndOf="@+id/imageView9"
             android:adjustViewBounds="false"
             android:scaleType="centerCrop"
-            app:srcCompat="@drawable/ic_mediamodifier_design_5_" />
+            app:srcCompat="@drawable/ic_mediamodifier_design_5_"
+            android:contentDescription="@string/station_layout_line_color"
+            />
     </RelativeLayout>
 
     <TextView
@@ -52,7 +58,7 @@
         android:layout_marginStart="0dp"
         android:layout_weight="1"
         android:fontFamily="sans-serif-medium"
-        android:text="TextView"
+        android:text="@string/default_value_station_name"
         android:textAlignment="viewStart"
         android:textSize="26sp" />
 
diff --git a/app/src/main/res/layout/winning_dialog.xml b/app/src/main/res/layout/winning_dialog.xml
index e8e125f..946ec64 100644
--- a/app/src/main/res/layout/winning_dialog.xml
+++ b/app/src/main/res/layout/winning_dialog.xml
@@ -14,7 +14,7 @@
         android:layout_marginTop="8dp"
         android:fontFamily="@font/titiliumweb_bold"
         android:padding="20dp"
-        android:text="¡Felicidades, ganaste una estrella!"
+        android:text="@string/winning_dialog_title"
         android:textAlignment="center"
         android:textColor="#000000"
         android:textSize="24sp"
@@ -30,7 +30,7 @@
         android:layout_marginBottom="16dp"
         android:backgroundTint="#000000"
         android:fontFamily="@font/titiliumweb_bold"
-        android:text="Ir al menu"
+        android:text="@string/winning_dialog_go_to_menu"
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.498"
@@ -41,10 +41,12 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginBottom="8dp"
+        android:contentDescription="@string/winning_dialog_star_description"
         app:layout_constraintBottom_toTopOf="@+id/buttonResetConfirmationDialog"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/lostTextView"
-        app:srcCompat="@drawable/lines_metro_star" />
+        app:srcCompat="@drawable/lines_metro_star"
+        tools:ignore="ImageContrastCheck" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index ba82738..859540f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,46 @@
 <resources>
     <string name="app_name">Metro metro</string>
+    <string name="content_description_menu_logo">Logo de la aplicacion</string>
+    <string name="content_description_button_play">Boton principal para jugar</string>
+    <string name="content_description_button_information">Boton para ver la informacion del Metro</string>
+    <string name="content_description_button_configuration">Boton para ver la configuracion del juego</string>
+    <string name="content_description_button_reset">Boton para resetear el juego</string>
+    <string name="default_value_score_star_view">0</string>
+    <string name="content_description_title_menu">Titulo de la pantalla</string>
+    <string name="content_description_go_back_button">Boton para ir hacia atras</string>
+    <string name="description_metro_information">Mapa del metro (Se puede hacer Zoom)</string>
+    <string name="image_metro_santiago">Imagen del Metro de Santiago de Chile</string>
+    <string name="metro_lines">Lineas Metro</string>
+    <string name="description_metro_information_scroll">Lineas del Metro de Santiago de Chile</string>
+    <string name="alternative1">alternative1</string>
+    <string name="alternative2">alternative2</string>
+    <string name="alternative3">alternative3</string>
+    <string name="alternative4">alternative4</string>
+    <string name="default_value_current_number_question">0</string>
+    <string name="separator_current_number_question">/</string>
+    <string name="default_max_number_current_number_question">20</string>
+    <string name="description_scroll_view_gameplay">Vista donde se muestran las lineas del metro avanzando</string>
+    <string name="configuration_title">Configuración</string>
+    <string name="configuration_sound">Sonido</string>
+    <string name="configuration_music">Musica</string>
+    <string name="reset_question">¿Estas seguro que quieres reiniciar? (Perderas todo tu progreso)</string>
+    <string name="reset_button_reset">Reiniciar</string>
+    <string name="reset_button_go_back">Volver</string>
+    <string name="content_description_reset_alert">Advertencia para reiniciar</string>
+    <string name="lost_dialog_title">¡Acabas de perder! :(</string>
+    <string name="lost_dialog_reset_level_button">Boton para reiniciar nivel</string>
+    <string name="reset_dialog_ads_button">Boton para ver ads y continuar jugando</string>
+    <string name="lost_dialog_continue">Continuar</string>
+    <string name="lost_dialog_reset_level">Reiniciar nivel</string>
+    <string name="menu_row_default_value">Linea 1</string>
+    <string name="menu_row_metro_color">Color del metro</string>
+    <string name="menu_row_background_color">Color de fondo del metro</string>
+    <string name="menu_row_star_description">Estrella del nivel, si esta conseguida aparece con color</string>
+    <string name="station_layout_background_metro_color">Color de fondo del metro</string>
+    <string name="station_layout_white_color">Color blanco del metro</string>
+    <string name="station_layout_line_color">Color del la linea</string>
+    <string name="default_value_station_name">TextView</string>
+    <string name="winning_dialog_title">¡Felicidades, ganaste una estrella!</string>
+    <string name="winning_dialog_go_to_menu">Ir al menu</string>
+    <string name="winning_dialog_star_description">Estrella ganada por completar el nivel</string>
 </resources>
\ No newline at end of file