moved the entries up one folder, added the folder to the keywords

games/blender_game_engine.md

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+# Blender game engine
+
+_Included in Blender is a complete game engine, allowing you to create a fully featured 3d game right inside Blender._
+
+- Home: https://www.blender.org/features/game-creation/, https://docs.blender.org/manual/en/dev/game_engine/index.html
+- State: mature
+- Download: https://www.blender.org/download/
+- Keywords: framework
+- Code repository: git://git.blender.org/blender.git (https://developer.blender.org/diffusion/)
+- Code language: C++
+- Code license: GPL-2.0
+
+Part of Blender.
+
+## Building
+
+- Build system: CMake
+- Build instructions: https://wiki.blender.org/index.php/Dev:Doc/Building_Blender