renamed games folder to entries folder (also contained frameworks, libraries, ...) and added to the backlog

entries/flappy_cow.md

@@ -0,0 +1,18 @@
+# Flappy Cow
+
+_Flappy Bird style game._
+
+- Home: https://github.com/cubei/FlappyCow
+- State: mature
+- Download: https://play.google.com/store/apps/details?id=com.quchen.flappycow
+- Platform: Android
+- Keywords: remake, inspired by Flappy Bird, skill
+- Code repository: https://github.com/cubei/FlappyCow.git
+- Code language: Java
+- Code license: MIT
+
+Renamed to FlutterCow because of a Google policy.
+
+## Building
+
+- Build system: Gradle