Very minor changes

osu.Android/OsuGameActivity.cs

@@ -6,15 +6,13 @@
 using Android.OS;
 using Android.Views;
 using osu.Framework.Android;
-using osu.Game;
 
 namespace osu.Android
 {
     [Activity(Theme = "@android:style/Theme.NoTitleBar", MainLauncher = true, ScreenOrientation = ScreenOrientation.SensorLandscape, SupportsPictureInPicture = false, ConfigurationChanges = ConfigChanges.Orientation | ConfigChanges.ScreenSize, HardwareAccelerated = true)]
     public class OsuGameActivity : AndroidGameActivity
     {
-        protected override Framework.Game CreateGame()
-            => new OsuGame();
+        protected override Framework.Game CreateGame() => new OsuGameAndroid();
 
         protected override void OnCreate(Bundle savedInstanceState)
         {

osu.Android/OsuGameAndroid.cs

@@ -0,0 +1,14 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
+// See the LICENCE file in the repository root for full licence text.
+
+using System;
+using Android.App;
+using osu.Game;
+
+namespace osu.Android
+{
+    public class OsuGameAndroid : OsuGame
+    {
+        public override Version AssemblyVersion => new Version(Application.Context.ApplicationContext.PackageManager.GetPackageInfo(Application.Context.ApplicationContext.PackageName, 0).VersionName);
+    }
+}

osu.Android/osu.Android.csproj

@@ -13,11 +13,9 @@
     <AssemblyName>osu.Android</AssemblyName>
     <AndroidManifest>Properties\AndroidManifest.xml</AndroidManifest>
   </PropertyGroup>
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|AnyCPU'">
-    <Optimize>true</Optimize>
-  </PropertyGroup>
   <ItemGroup>
     <Compile Include="OsuGameActivity.cs" />
+    <Compile Include="OsuGameAndroid.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="Properties\AndroidManifest.xml" />