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

games/urho3d.md

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+# Urho3D
+
+_Urho3D is a free lightweight, cross-platform 2D and 3D game engine._
+
+- Home: https://urho3d.github.io/
+- State: mature
+- Download: https://sourceforge.net/projects/urho3d/files/Urho3D/
+- Keywords: framework
+- Code repository: https://github.com/urho3d/Urho3D.git
+- Code language: C++, AngelScript
+- Code license: MIT
+
+## Building
+
+- Build system: CMake
+