diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index e1ca4a6..0dff777 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -6,8 +6,11 @@
      that other apps created.
     -->
     <uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
+        android:maxSdkVersion="32" />
 
     <uses-permission android:name="android.permission.VIBRATE"/>
+    <attribution android:tag="oche_gameplay" android:label="@string/attribution_label" />
 
     <application
         android:allowBackup="true"
diff --git a/app/src/main/java/com/aldo/apps/ochecompanion/AddPlayerActivity.java b/app/src/main/java/com/aldo/apps/ochecompanion/AddPlayerActivity.java
index cb62c97..60cdc1f 100644
--- a/app/src/main/java/com/aldo/apps/ochecompanion/AddPlayerActivity.java
+++ b/app/src/main/java/com/aldo/apps/ochecompanion/AddPlayerActivity.java
@@ -1,9 +1,12 @@
 package com.aldo.apps.ochecompanion;
 
+import android.Manifest;
+import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.graphics.RectF;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.MotionEvent;
@@ -16,7 +19,9 @@ import android.widget.Toast;
 import androidx.activity.result.ActivityResultLauncher;
 import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
+import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.content.ContextCompat;
 import androidx.core.graphics.Insets;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
@@ -157,6 +162,15 @@ public class AddPlayerActivity extends AppCompatActivity {
                 }
             });
 
+    private final ActivityResultLauncher<String> requestPermissionLauncher = registerForActivityResult(
+            new ActivityResultContracts.RequestPermission(), isGranted -> {
+                if (isGranted) {
+                    mGetContent.launch("image/*");
+                } else {
+                    Toast.makeText(this, "Permission denied to read images", Toast.LENGTH_SHORT).show();
+                }
+            });
+
     /**
      * Called when the activity is first created. Initializes UI and loads existing player if present.
      * 
@@ -207,7 +221,7 @@ public class AddPlayerActivity extends AppCompatActivity {
         mCropOverlay = findViewById(R.id.cropOverlay);
 
         // Set up click listeners
-        mProfilePictureView.setOnClickListener(v -> mGetContent.launch("image/*"));
+        mProfilePictureView.setOnClickListener(v -> checkForPermissionAndLaunchImagePicker());
         mSaveButton.setOnClickListener(v -> savePlayer());
         if (mBtnDelete != null) {
             mBtnDelete.setOnClickListener(v -> deletePlayer());
@@ -216,6 +230,32 @@ public class AddPlayerActivity extends AppCompatActivity {
         findViewById(R.id.btnCancelCrop).setOnClickListener(v -> exitCropMode());
     }
 
+    private void checkForPermissionAndLaunchImagePicker() {
+        final String permission = Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU
+                ? Manifest.permission.READ_MEDIA_IMAGES
+                : Manifest.permission.READ_EXTERNAL_STORAGE;
+
+        if (ContextCompat.checkSelfPermission(this, permission) == PackageManager.PERMISSION_GRANTED) {
+            // Already have permission
+            mGetContent.launch("image/*");
+        } else if (shouldShowRequestPermissionRationale(permission)) {
+            // Explain to the user why the permission is needed before requesting
+            showRationaleDialog(permission);
+        } else {
+            // Directly request the permission
+            requestPermissionLauncher.launch(permission);
+        }
+    }
+
+    private void showRationaleDialog(final String permission) {
+        new AlertDialog.Builder(this)
+                .setTitle(R.string.txt_permission_hint_title)
+                .setMessage(R.string.txt_permission_hint_description)
+                .setPositiveButton(R.string.txt_permission_hint_button_ok, (d, w) -> requestPermissionLauncher.launch(permission))
+                .setNegativeButton(R.string.txt_permission_hint_button_cancel, null)
+                .show();
+    }
+
     /**
      * Initializes gesture detectors to handle pinch-to-zoom and pan gestures.
      */
@@ -436,7 +476,9 @@ public class AddPlayerActivity extends AppCompatActivity {
     }
 
     /**
-     * Deletes the selected player from the database.
+     * Deletes the currently loaded player from the database.
+     * Shows confirmation toast and closes the activity upon successful deletion.
+     * Runs database operation on background thread. Does nothing if no player is loaded.
      */
     private void deletePlayer() {
         if (mExistingPlayer == null) return;
diff --git a/app/src/main/java/com/aldo/apps/ochecompanion/GameActivity.java b/app/src/main/java/com/aldo/apps/ochecompanion/GameActivity.java
index 1641ce3..66168b1 100644
--- a/app/src/main/java/com/aldo/apps/ochecompanion/GameActivity.java
+++ b/app/src/main/java/com/aldo/apps/ochecompanion/GameActivity.java
@@ -4,7 +4,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.res.ColorStateList;
 import android.graphics.Color;
-import android.media.SoundPool;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.VibrationEffect;
@@ -26,10 +25,8 @@ import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
 
 import com.aldo.apps.ochecompanion.database.AppDatabase;
-import com.aldo.apps.ochecompanion.database.objects.Match;
 import com.aldo.apps.ochecompanion.database.objects.Player;
 import com.aldo.apps.ochecompanion.database.objects.Statistics;
-import com.aldo.apps.ochecompanion.utils.CheckoutConstants;
 import com.aldo.apps.ochecompanion.utils.CheckoutEngine;
 import com.aldo.apps.ochecompanion.utils.DartsConstants;
 import com.aldo.apps.ochecompanion.utils.SoundEngine;
@@ -169,7 +166,7 @@ public class GameActivity extends AppCompatActivity {
     /**
      * Array of three TextViews showing darts thrown in current turn.
      */
-    private TextView[] tvDartPills = new TextView[3];
+    private final TextView[] tvDartPills = new TextView[3];
     
     /**
      * GridLayout container holding numeric keyboard buttons (1-20).
@@ -220,9 +217,7 @@ public class GameActivity extends AppCompatActivity {
         new Thread(() -> {
             final List<Player> allAvailablePlayers = AppDatabase.getDatabase(GameActivity.this).playerDao().getAllPlayers();
             Log.d(TAG, "onCreate: allAvailablePlayers = [" + allAvailablePlayers + "]");
-            runOnUiThread(() -> {
-                setupGame(allAvailablePlayers);
-            });
+            runOnUiThread(() -> setupGame(allAvailablePlayers));
         }).start();
     }
 
@@ -395,6 +390,16 @@ public class GameActivity extends AppCompatActivity {
         }
     }
 
+    /**
+     * Updates player statistics in the database after a turn.
+     * Tracks darts thrown, points made, missed darts, and updates career average.
+     * Runs on background thread to avoid blocking UI.
+     *
+     * @param active Current player's game state
+     * @param dartsThrown Number of darts thrown this turn
+     * @param pointsMade Total points scored this turn
+     * @param wasBust Whether the turn resulted in a bust
+     */
     private void updatePlayerStats(GameActivity.X01State active, int dartsThrown, int pointsMade, boolean wasBust) {
         new Thread(() -> {
             final Player player = active.player;
@@ -411,7 +416,7 @@ public class GameActivity extends AppCompatActivity {
                 // Calculate career average: total points / total darts thrown
                 final long totalDarts = playerStats.getDartsThrown();
                 if (totalDarts > 0) {
-                    player.careerAverage = (double) playerStats.getOverallPointsMade() / totalDarts;
+                    player.careerAverage = (double) playerStats.getOverallPointsMade() / totalDarts * 3;
                 } else {
                     player.careerAverage = 0.0;
                 }
@@ -443,7 +448,15 @@ public class GameActivity extends AppCompatActivity {
 
             final Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
             if (vibrator != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
-                vibrator.vibrate(VibrationEffect.createOneShot(300, VibrationEffect.DEFAULT_AMPLITUDE));
+                Log.d(TAG, "submitTurn: Pattern vibration");
+                // Pattern that should match the 180 shout.
+                long[] pattern = {0, 150, 100, 1650, 50, 150, 10, 500, 300, 200};
+                vibrator.vibrate(VibrationEffect.createWaveform(pattern, -1));
+            } else if (vibrator != null) {
+                Log.d(TAG, "submitTurn: Vibrating legacy mode");
+                vibrator.vibrate(500);
+            } else {
+                Log.e(TAG, "submitTurn: Vibrator not available");
             }
             mSoundEngine.playOneHundredAndEightySound();
         }
@@ -601,9 +614,11 @@ public class GameActivity extends AppCompatActivity {
 
     /**
      * Handles win condition when a player finishes on zero with a double.
-     * Displays win toast and finishes activity.
+     * Updates statistics, displays win toast, and plays celebration animation.
      *
      * @param winner X01State of the winning player
+     * @param dartsThrown Number of darts thrown in the winning turn
+     * @param pointsMade Points scored in the winning turn
      */
     private void handleWin(final X01State winner, final int dartsThrown, final int pointsMade) {
         updatePlayerStats(winner, dartsThrown, pointsMade, false);
@@ -619,6 +634,12 @@ public class GameActivity extends AppCompatActivity {
         // - Offer rematch
     }
 
+    /**
+     * Plays confetti animation and displays winner's name overlay.
+     * Shows full-screen dimmer with celebratory confetti effect.
+     *
+     * @param winnerName Name of the winning player to display
+     */
     private void playWinnerAnimation(final String winnerName) {
         final KonfettiView konfettiView = findViewById(R.id.konfetti_view);
         final View dimmerLayout = findViewById(R.id.dimmer);
diff --git a/app/src/main/java/com/aldo/apps/ochecompanion/MainMenuActivity.java b/app/src/main/java/com/aldo/apps/ochecompanion/MainMenuActivity.java
index f9421b6..fd46fbf 100644
--- a/app/src/main/java/com/aldo/apps/ochecompanion/MainMenuActivity.java
+++ b/app/src/main/java/com/aldo/apps/ochecompanion/MainMenuActivity.java
@@ -4,7 +4,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
-import android.view.View;
 import android.widget.TextView;
 
 import androidx.activity.EdgeToEdge;
@@ -20,6 +19,7 @@ import com.aldo.apps.ochecompanion.database.AppDatabase;
 import com.aldo.apps.ochecompanion.database.objects.Player;
 import com.aldo.apps.ochecompanion.database.objects.Match;
 import com.aldo.apps.ochecompanion.ui.MatchRecapView;
+import com.aldo.apps.ochecompanion.ui.QuickStartButton;
 import com.aldo.apps.ochecompanion.ui.adapter.MainMenuPlayerAdapter;
 import com.aldo.apps.ochecompanion.utils.DartsConstants;
 import com.aldo.apps.ochecompanion.utils.UIConstants;
@@ -77,7 +77,11 @@ public class MainMenuActivity extends AppCompatActivity {
             return insets;
         });
 
-        findViewById(R.id.quick_start_btn).setOnClickListener(v -> quickStart());
+        final QuickStartButton quickStartBtn = findViewById(R.id.quick_start_btn);
+        final String defaultGameMode = mSettingsPref.getString(getString(R.string.pref_desc_standard_game_mode),
+                getString(R.string.pref_game_mode_501_value));
+        quickStartBtn.setSubText(defaultGameMode);
+        quickStartBtn.setOnClickListener(v -> quickStart());
         findViewById(R.id.btnSettings).setOnClickListener(v -> launchSettings());
 
         // Set up match recap view with test data functionality
diff --git a/app/src/main/java/com/aldo/apps/ochecompanion/utils/SoundEngine.java b/app/src/main/java/com/aldo/apps/ochecompanion/utils/SoundEngine.java
index c9772d5..2bb74b0 100644
--- a/app/src/main/java/com/aldo/apps/ochecompanion/utils/SoundEngine.java
+++ b/app/src/main/java/com/aldo/apps/ochecompanion/utils/SoundEngine.java
@@ -1,14 +1,21 @@
 package com.aldo.apps.ochecompanion.utils;
 
+import static android.media.AudioAttributes.CONTENT_TYPE_SONIFICATION;
+import static android.media.AudioAttributes.USAGE_GAME;
+
 import android.content.Context;
+import android.media.AudioAttributes;
 import android.media.SoundPool;
+import android.os.Build;
 import android.util.Log;
 
 import com.aldo.apps.ochecompanion.R;
 
-import java.lang.ref.WeakReference;
-import java.util.SimpleTimeZone;
-
+/**
+ * Singleton sound engine for managing game audio effects.
+ * Uses Android SoundPool API for low-latency sound playback during gameplay.
+ * Supports winner celebration, bust notifications, and perfect score achievements.
+ */
 public final class SoundEngine {
 
     /**
@@ -16,30 +23,80 @@ public final class SoundEngine {
      */
     private static final String TAG = "SoundEngine";
 
-    private Context mContext;
+    /**
+     * Application context used for audio operations.
+     * On Android R+, uses attribution context for proper audio tracking.
+     */
+    private final Context mContext;
 
+    /**
+     * Singleton instance of the SoundEngine.
+     */
     private static SoundEngine sInstance;
 
+    /**
+     * Android SoundPool for low-latency audio playback.
+     * Configured with game audio attributes and max 5 concurrent streams.
+     */
     private final SoundPool mSoundPool;
 
+    /**
+     * Flag indicating whether all sound resources have been loaded.
+     * Set to true by the OnLoadCompleteListener once all sounds are ready.
+     */
     private boolean mIsReady;
 
-    private int mWinnerSoundId;
+    /**
+     * Sound ID for the winner celebration audio effect.
+     * Loaded from R.raw.winner resource.
+     */
+    private final int mWinnerSoundId;
 
-    private int mBustedSoundId;
+    /**
+     * Sound ID for the bust notification audio effect.
+     * Loaded from R.raw.busted resource.
+     */
+    private final int mBustedSoundId;
 
-    private int m180SoundId;
+    /**
+     * Sound ID for the perfect score (180) celebration audio effect.
+     * Loaded from R.raw.onehundredandeighty resource.
+     */
+    private final int m180SoundId;
 
+    /**
+     * Private constructor for singleton pattern.
+     * Initializes SoundPool with game audio attributes and preloads sound effects.
+     *
+     * @param context Application context for loading sound resources
+     */
     private SoundEngine(final Context context) {
-        mContext = context;
-        mSoundPool = new SoundPool.Builder().setMaxStreams(5).build();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+            mContext = context.createAttributionContext("oche_gameplay");
+        } else {
+            mContext = context;
+        }
+        mSoundPool = new SoundPool.Builder()
+                .setMaxStreams(5)
+                .setAudioAttributes(new AudioAttributes.Builder()
+                        .setUsage(USAGE_GAME)
+                        .setContentType(CONTENT_TYPE_SONIFICATION)
+                        .build())
+                .build();
         mSoundPool.setOnLoadCompleteListener((soundPool, sampleId, status) -> mIsReady = true);
-        mWinnerSoundId = mSoundPool.load(context, R.raw.winner, 1);
-        mBustedSoundId = mSoundPool.load(context, R.raw.busted, 1);
-        m180SoundId = mSoundPool.load(context, R.raw.onehundredandeighty, 1);
+        mWinnerSoundId = mSoundPool.load(context.getApplicationContext(), R.raw.winner, 1);
+        mBustedSoundId = mSoundPool.load(context.getApplicationContext(), R.raw.busted, 1);
+        m180SoundId = mSoundPool.load(context.getApplicationContext(), R.raw.onehundredandeighty, 1);
 
     }
 
+    /**
+     * Gets the singleton SoundEngine instance.
+     * Creates instance on first call using the provided context.
+     *
+     * @param context Application context for initialization
+     * @return Singleton SoundEngine instance
+     */
     public static SoundEngine getInstance(final Context context) {
         if (sInstance == null) {
             sInstance = new SoundEngine(context);
@@ -47,6 +104,10 @@ public final class SoundEngine {
         return sInstance;
     }
 
+    /**
+     * Plays the winner celebration sound effect.
+     * Only plays if sound engine has finished loading resources.
+     */
     public void playWinnerSound() {
         if (mIsReady) {
             mSoundPool.play(mWinnerSoundId, 1.0f, 1.0f, 0, 0, 1.0f);
@@ -55,6 +116,10 @@ public final class SoundEngine {
         }
     }
 
+    /**
+     * Plays the bust notification sound effect.
+     * Only plays if sound engine has finished loading resources.
+     */
     public void playBustedSound() {
         if (mIsReady) {
             mSoundPool.play(mBustedSoundId, 1.0f, 1.0f, 0, 0, 1.0f);
@@ -63,6 +128,10 @@ public final class SoundEngine {
         }
     }
 
+    /**
+     * Plays the 180 score notification sound effect.
+     * Only plays if sound engine has finished loading resources.
+     */
     public void playOneHundredAndEightySound() {
         if (mIsReady) {
             mSoundPool.play(m180SoundId, 1.0f, 1.0f, 0, 0, 1.0f);
diff --git a/app/src/main/res/anim/shake.xml b/app/src/main/res/anim/shake.xml
index f3d3989..f7343f4 100644
--- a/app/src/main/res/anim/shake.xml
+++ b/app/src/main/res/anim/shake.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <translate xmlns:android="http://schemas.android.com/apk/res/android"
-    android:duration="50"
-    android:fromXDelta="0"
-    android:toXDelta="15"
-    android:repeatCount="8"
+    android:duration="80"
+    android:fromXDelta="-12"
+    android:toXDelta="12"
+    android:repeatCount="15"
     android:repeatMode="reverse"
-    android:interpolator="@android:anim/linear_interpolator" />
\ No newline at end of file
+    android:interpolator="@android:anim/cycle_interpolator" />
\ 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 520c6d8..b789a9a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -21,6 +21,10 @@
     <string name="txt_update_profile_username_save">Update Squad</string>
     <string name="txt_cancel_crop">Cancel</string>
     <string name="txt_confirm_crop">Confirm Crop</string>
+    <string name="txt_permission_hint_title">Image Permission required</string>
+    <string name="txt_permission_hint_description">This app needs access to your images to set a custom profile picture</string>
+    <string name="txt_permission_hint_button_ok">OK</string>
+    <string name="txt_permission_hint_button_cancel">Cancel</string>
 
     <!-- GameActivity -->
     <string name="txt_game_btn_single">Single</string>
@@ -32,9 +36,9 @@
     <!-- Preference Strings -->
     <string name="pref_key_day_night_mode">day_night_mode</string>
     <string name="pref_key_standard_game_mode">standard_game_mode</string>
-    <string name="pref_game_mode_701_value">701</string>
-    <string name="pref_game_mode_501_value">501</string>
-    <string name="pref_game_mode_301_value">301</string>
+    <string name="pref_game_mode_701_value">Standard 701 - Double Out</string>
+    <string name="pref_game_mode_501_value">Standard 501 - Double Out</string>
+    <string name="pref_game_mode_301_value">Standard 301 - Double Out</string>
     <string name="pref_game_mode_cricket_value">Cricket</string>
     <string name="pref_desc_day_night_mode">Day/Night Mode</string>
     <string name="pref_title_standard_game_mode">Standard Game Mode</string>
@@ -61,4 +65,7 @@
     <string name="attachment_summary_on">Automatically download attachments for incoming emails
     </string>
     <string name="attachment_summary_off">Only download attachments when manually requested</string>
+
+    <!-- Other strings -->
+    <string name="attribution_label">"Oche Game Effects"</string>
 </resources>
\ No newline at end of file