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

entries/cannon_smash.md

@@ -4,13 +4,11 @@
 - State: beta, inactive since 2003
 - Download: https://sourceforge.net/projects/cannonsmash/files/
 - Platform: Windows, Linux
-- Keyword: sports
+- Keyword: sports, table tennis
 - Code repository: https://gitlab.com/osgames/cannonsmash.git (import of cvs), http://cannonsmash.cvs.sourceforge.net (cvs)
 - Code language: C++
 - Code license: GPL-2.0
 - Code dependency: OpenGL
 - Developer: Kanna Yoshihiro
 
-Table tennis game.
-
 ## Building