Fix/complete metadata and documentation

README.md

-# calculus
+# Colors, a color flood fill game
+
+## Your mission
+
+Fill the board with only one color.
+
+## How to play
+
+### Start game
+
+-   Select game settings (difficulty, board size, colors count and skin)
+-   Hit play button to generate a randomly colored board
+
+### Play
+
+-   Pick color from palette, all touching cells from top left with the same color will be filled with this selected color
+-   Repeat until all board is filled
+
+### Victory
+
+-   If you can fill board with less moves count than show target, you win!
+
+## Credits
+
+This game is heavily inspired from [Open Flood](https://f-droid.org/en/packages/com.gunshippenguin.openflood/), a simple but addictive flood fill game, available on [F-Droid repository](https://f-droid.org/en/) ([source code](https://github.com/GunshipPenguin/open_flood)).
+
+This application is built with Flutter framework.

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.13
-app.versionCode=13
+app.versionName=0.0.14
+app.versionCode=14