diff --git a/README.md b/README.md
new file mode 100644
index 0000000..28298ed
--- /dev/null
+++ b/README.md
@@ -0,0 +1,25 @@
+# Tromi (MOBILE port)
+A old-fashioned but modern block-stacking game. Made with love by [mycophobia](https://mycophobia.org/tromi).<br>
+Ported to Android by SweetSea with on-screen control (with some necessary changes)
+
+# How to play
+> :warning: There is no Android build (aka APK file) right now. If you see any pre-built APK files on the internet. Please be aware
+## Install
+1. Download Tromi from [Releases tab](https://gitea.com/SweetSea-ButImNotSweet/tromi_mobile/releases) and place ``tromi_mobile.love`` to somewhere you can easy to navigate
+2. Download [love2d engine](https://love2d.org) (You should get 11.5 or above)
+3. Install love2d engine (extra steps may require, you can read [this article from WikiHow](https://www.wikihow.com/Install-APK-Files-on-Android) if this is the first time for you to install app from APK file)
+4. Now, press Home (or back to app launcher), you can see two icons: ``LÖVE for Android`` and ``LÖVE Launcher``. You should use the ``LÖVE Launcher`` to launch Tromi
+## Launch
+1. Launch ``LÖVE Launcher``, an file picker will appear
+2. Navigate to where you put the bare ``tromi_mobile.love``
+3. Pick the file and enjoy
+
+# Differences from original Tromi
+> This is required, to follow the used license (GPL v3 and later)
+* No differences in gameplay
+* Files will be saved into ``Android/data/org.love2d.android/tromi_mobile`` instead the location where the game files in
+* All UIs are touch-able
+* <detail><summary>Changes the way to input secret code to activate Pentominoes mode</summary>
+<img title="This is where you should tap to input the Secret code" src="/screenshot/SPOILER_secret_code.png">
+To insert the left arrow, tap on the left, so does to right arrow.
+</detail>
\ No newline at end of file
diff --git a/main.lua b/main.lua
index 89657b8..324ec34 100644
--- a/main.lua
+++ b/main.lua
@@ -102,14 +102,14 @@ function love.draw()
     --     love.graphics.line(0, grid_height * iy, 640, grid_height * iy)
     -- end
 
-    local x, y = GLOBAL_TRANSFORM:inverseTransformPoint(love.mouse.getPosition())
-    love.graphics.setColor(0, 0, 0, 0.8)
-    love.graphics.rectangle("fill", 5, 450, 115, 25)
-    drawText(string.format("X: %.1d; Y: %.1d", x, y), 10, 455, 110, "left")
+    -- local x, y = GLOBAL_TRANSFORM:inverseTransformPoint(love.mouse.getPosition())
+    -- love.graphics.setColor(0, 0, 0, 0.8)
+    -- love.graphics.rectangle("fill", 5, 450, 115, 25)
+    -- drawText(string.format("X: %.1d; Y: %.1d", x, y), 10, 455, 110, "left")
 
-    love.graphics.setColor(1, 1, 1, 1)
-    love.graphics.setLineWidth(2)
-    love.graphics.rectangle("line", 0, 0, 640, 480)
+    -- love.graphics.setColor(1, 1, 1, 1)
+    -- love.graphics.setLineWidth(2)
+    -- love.graphics.rectangle("line", 0, 0, 640, 480)
 
     love.graphics.pop()
 end
diff --git a/screenshot/SPOILER_secret_code.png b/screenshot/SPOILER_secret_code.png
new file mode 100644
index 0000000..cc57e5b
Binary files /dev/null and b/screenshot/SPOILER_secret_code.png differ