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

games/castle_game_engine.md

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+# Castle Game Engine
+
+_3D and 2D game engine using modern Object Pascal._
+
+- Home: https://castle-engine.io/
+- State: mature 
+- Download: (see home)
+- Keywords: framework, game engine
+- Code repository: https://github.com/castle-engine/castle-engine.git
+- Code language: Pascal
+- Code license: LGPL-2.0 (visual editor and some other assets GPL-2.0)
+
+## Building
+
+