descriptions of entries checked and either incorporated to keywords and inspirations or redundancies removed

entries/mmpong.md

@@ -1,6 +1,7 @@
 # Mmpong
 
 - Home: https://web.archive.org/web/20100528120001/http://mmpong.net/trac, https://packages.debian.org/source/jessie/mmpong
+- Inspiration: Pong
 - State: beta, inactive since 2009
 - Keyword: arcade, multiplayer, online
 - Code repository: @see-debian
@@ -8,8 +9,6 @@
 - Code license: GPL-3.0
 - Developer: Kai Hertel, Jan Friederich
 
-Multiplayer Pong game.
-
 ## Building
 
 - Build system: CMake