diff --git a/android/README.md b/android/README.md
index a25d771..5a6b3b0 100644
--- a/android/README.md
+++ b/android/README.md
@@ -6,7 +6,44 @@ Minimum supported Android version: 5.0
 You can download prebuilt APKs
 [here](https://github.com/kichikuou/xsystem35-sdl2/releases).
 
-## Build
+## Usage
+### Basic Usage
+1. Create a ZIP file containing all the game files and BGM files (see
+   [below](#preparing-a-zip) for details), and transfer it to your device.
+2. Open the app. Tap the option menu (three dots in the top right corner) and
+   select "Install from ZIP".
+3. Select the ZIP file you created in step 1.
+4. The game will start. To simulate a right-click, tap the black bars on either
+   the left or right, or top or bottom of the screen.
+
+### Preparing a ZIP
+- Include all files from the `GAMEDATA` folder (such as `.ALD` files and
+  others). `.EXE` and `.DLL` files are not necessary, but you can include them
+  if you want.
+- Music files (`.mp3`, `.ogg`, or `.wav`) whose filenames have a number either
+  at the beginning or just before the extension are recognized as BGM files.
+  For example:
+  - `Track2.mp3`
+  - `15.ogg`
+  - `02 - Title.mp3`
+  - `rance4_03.wav` (Note: The filename shouldn't be `rance403.wav`, as it
+    would be treated as the 403rd track.)
+
+Note: This ZIP format is also compatible with
+[Kichikuou on Web](http://kichikuou.github.io/web/).
+
+### Miscellaneous
+- You can export or import save files via the game list's option menu.
+- To uninstall a game, long-tap its title in the game list.
+
+## Known Issues
+- Android versions older than 7.0 cannot handle ZIP files containing Shift-JIS
+  filenames. This issue occurs with some ZIP files distributed on
+  [retroc.net](http://retropc.net/alice/). If you encounter the error message
+  "This type of ZIP is not supported," unzip the file on your PC and re-archive
+  it using modern ZIP creation software.
+
+## Building from Source
 
 ### Using Android Studio
 Open this directory as an Android Studio project.
@@ -34,39 +71,3 @@ git clone https://github.com/kichikuou/xsystem35-sdl2.git
 cd xsystem35-sdl2/android
 ./gradlew build  # or ./gradlew installDebug if you have a connected device
 ```
-
-## Usage
-### Basic Usage
-1. Create a ZIP file containing all the game files and BGM files (see
-   [below](#preparing-a-zip) for details), and transfer it to your device.
-2. Open the app. A list of installed games will be displayed. Since no games
-   have been installed yet, only the "Install from ZIP" button will be visible.
-   Tap it.
-3. Select the ZIP file you created in step 1.
-4. The game will start. To simulate a right-click, tap the black bars on either
-   the left or right, or top or bottom of the screen.
-
-### Preparing a ZIP
-- Include all files from the `GAMEDATA` folder (such as `.ALD` files and
-  others). `.EXE` and `.DLL` files are not necessary, but you can include them
-  if you want.
-- Music files (`.mp3`, `.ogg`, or `.wav`) whose filenames end with a number
-  will be recognized as BGM files. For example:
-  - `Track2.mp3`
-  - `15.ogg`
-  - `rance4_03.wav` (Note: The filename shouldn't be `rance403.wav`, as it
-    would be treated as the 403rd track.)
-
-Note: This ZIP format is also compatible with
-[Kichikuou on Web](http://kichikuou.github.io/web/).
-
-### Miscellaneous
-- You can export or import save files via the game list's option menu.
-- To uninstall a game, long-tap its title in the game list.
-
-## Known Issues
-- Android versions older than 7.0 cannot handle ZIP files containing Shift-JIS
-  filenames. This issue occurs with some ZIP files distributed on
-  [retroc.net](http://retropc.net/alice/). If you encounter the error message
-  "This type of ZIP is not supported," unzip the file on your PC and re-archive
-  it using modern ZIP creation software.